Public dossier Methodology
Methodology
How we build the simulator, the map and the vote, and how we rate sources. Every parameter is listed here.
The odour simulator
Illustrative simulation based on scientific literature and other countries' rules; it does not replace an odour study of the project.
The simulator uses a steady-state Gaussian model, the simplest dispersion model. It is illustrative: it does not replace an odour study of the project.
Ground-level concentration (ground-level source, H = 0 m; receptor at z = 1.5 m; with ground reflection):
C = Q / (π · σy · σz · u) · exp(−y² / 2σy²) · [exp(−(z−H)² / 2σz²) + exp(−(z+H)² / 2σz²)] / 2
- Q: odour emission (ouE/s), according to the chosen scenario.
- u: wind speed (m/s), floored at 1.0 m/s. Below 1 m/s the wind is treated as light and variable and the simulator draws a circle instead of a plume.
- σy, σz: lateral and vertical spread (Briggs rural formulas), with an initial spread σy0 = 30 m and σz0 = 5 m added in quadrature to represent a site of about 5 ha.
| Class | σy | σz |
|---|---|---|
| A | 0.22·x·(1+0.0001x)^−½ | 0.20·x |
| B | 0.16·x·(1+0.0001x)^−½ | 0.12·x |
| C | 0.11·x·(1+0.0001x)^−½ | 0.08·x·(1+0.0002x)^−½ |
| D | 0.08·x·(1+0.0001x)^−½ | 0.06·x·(1+0.0015x)^−½ |
| E | 0.06·x·(1+0.0001x)^−½ | 0.03·x·(1+0.0003x)^−1 |
| F | 0.04·x·(1+0.0001x)^−½ | 0.016·x·(1+0.0003x)^−1 |
The stability class (A–F) comes from the Turner table, from the wind, the sun's elevation (computed from the time and latitude) and the cloud cover; it can also be chosen by hand.
Peak factor. The German method counts an "odour hour" when the hourly mean exceeds 0.25 GE/m³, i.e. it applies a factor of 4. That factor is for counting frequencies over a year, not for drawing where odour can be noticed in a given hour, so it is off by default. Switched on, it stretches the plume a long way: in class D, with a 3 m/s wind and 20,000 ouE/s, the 1 ouE/m³ threshold moves from about 770 m to ≈ 1.9 km.
Cap and calm nights. The plume is cut at 3 km, the odour assessment radius in French law. In classes E and F (calm, stable nights) the model is unreliable, so the plume is drawn hatched.
Wind. Live wind comes from Open-Meteo, requested by our server and cached for 15 minutes so that your IP address is not sent to a third party.
Typical conditions. The simulator opens in typical conditions: the prevailing west-north-westerly wind (292.5°) at 3 m/s, an overcast sky (class D, neutral) and the medium scenario of 20,000 ouE/s. In these conditions odour may be noticeable up to about 770 m to the east-south-east. Every control can be changed, and the page link keeps your choice.
A year of wind. This view uses the 2021–2025 hours of the ERA5 reanalysis for the site, grouped by direction (16 sectors), speed band and day or night. Each group goes through the same model with the chosen scenario: moderate sun by day, little cloud at night. Each 22.5° sector is spread over 9 sub-directions, so the result does not hinge on the exact bearing of each village. For each receptor it shows the share of the year's hours above 1 and 5 ouE/m³. Winds below 1 m/s count as 1 m/s from the recorded direction, and places beyond 3 km are not counted.
Emission scenarios
| ouE/s | Scenario |
|---|---|
| 10,000 | Low (enclosed, air treatment working) |
| 20,000 | Medium (mean measured at real plants) |
| 80,000 | High (open storage / digestate drying) |
| 150,000 | Failure (air treatment breakdown) |
Thresholds drawn
| ouE/m³ | Meaning |
|---|---|
| 1 | odour possibly noticeable |
| 3 | odour probably noticeable |
| 5 | distinct odour / possible nuisance |
Thresholds based on the English and Irish odour benchmarks.
Validation: With 20,000 ouE/s and daytime conditions the model gives 300–800 m; field measurements at European biogas plants: 250–600 m.
Noise and traffic
Illustrative simulation based on studies of other plants, Portuguese law and WHO guidelines; it does not replace a noise study for the project.
The noise model is illustrative: it does not replace a noise study for the project. The formulas follow the simplified ISO 9613-2 method.
Plant (point source, hemispherical spreading):
Lp(d) = LwA − 20·log10(d) − 8 − α·d/1000 − Agr
Agr = max(0, 4.8 − (2·hm/d)·(17 + 300/d)) (ground effect, porous ground)
One truck passing (peak level, 6 dB less for each doubling of distance):
LAmax(d) = LAmax(7.5 m) − 20·log10(d / 7.5)
At a house front, +3 dB is added for the façade reflection (a modelling choice).
Energy of one pass and the daily average:
SEL = LAmax + 10·log10(π·d / v)
LAeq,T = SEL + 10·log10(N) − 10·log10(T) (N passes in T seconds)
Lden, over the RGR periods: 13 h of day (07–20), 3 h of evening (20–23, +5 dB) and 8 h of night (23–07, +10 dB):
Lden = 10·log10((13·10^(Ld/10) + 3·10^((Le+5)/10) + 8·10^((Ln+10)/10)) / 24)
Truck halos. Each truck carries a halo out to where its peak, after air absorption and the ground effect (the same α and hm as for the plant), stays at least 10 dB above the background noise of the period. That is what "clearly audible" means on the map (a modelling choice). The radius d is the distance, found by successive approximation, where:
LAmax(7.5 m) − 20·log10(d / 7.5) − α·d/1000 − Agr(d) = background + 10
Animation. One simulated day: the clock runs slowly (1 simulated minute per second) while a truck is on the road and fast (1 hour in 2 seconds) when the roads are empty, without skipping any departure. With reduced motion, the trucks are shown still, spaced along the routes.
Wind. We found no defensible value for a wind correction of noise: the wind is shown as an arrow only.
Model parameters
| Parameter | Value |
|---|---|
| Plant sound power LwA (low / central / high) | 98 / 104 / 110 dB(A) (Assumption) estimate from components (low confidence) |
| Tonal penalty (RGR comparison) | +3 dB(A) |
| Air absorption α | 2 dB/km |
| Mean source and receiver height hm | 1.5 m (Assumption) Assumed mean source/receiver height (1.5 m) |
| RGR periods (day / evening / night) | 07–20 h / 20–23 h / 23–07 h |
| Background noise (day / evening / night) | 35 / 32 / 28 dB(A) (Assumption) |
| Annoyance criterion (day / evening / night) | +5 / +4 / +3 dB(A) |
| Criterion not applied with ambient noise up to | 45 dB(A) |
| Mixed zone limits (Lden / Ln) | 65 / 55 dB(A) (Assumption) mixed zone (1st revision of the Guarda PDM, art. 34; entry into force not confirmed). 1st PDM revision: takes effect once the REN delimitation is published; we have not confirmed that it is in force. |
| Limits where zones are not classified (Lden / Ln) | 63 / 53 dB(A) |
| WHO, road traffic (Lden / Lnight) | 53 / 45 dB |
| Truck LAmax at 7.5 m (low / central / high) | 75 / 82 / 88 dB(A) |
| Façade distance and reflection | 5 m (Assumption); +3 dB |
| Truck speed (in the village / outside) | 30 / 60 km/h (Assumption) 30 km/h in the village: assumption (07 §9.2); 60 km/h outside the villages: modelling choice |
| Loads a day (simulator range) | 25 (5–60) (Assumption) Capacity and truck numbers not disclosed: we use 25 loads a day (50 passages, there and back), a conservative figure, probably on the low side. |
| Unloading time | 45 min (Assumption) |
| Halo margin ("clearly audible") | +10 dB (Assumption) modelling choice |
(Assumption) = assumption, not a measured value.
Check sums (with the values above)
- Plant at 1 km, central scenario: 104 − 20·log10(1000) − 8 − 2.0 − 4.7 (ground) ≈ 29.3 dB(A).
- At a house front 5 m away: 82 − 20·log10(5/7.5) + 3 ≈ 88.5 dB(A), rounded to ≈ 89.
- Above the typical night-time background: 88.5 − 28 = 60.5 dB; in the text, rounded to 5 dB: ≈ 60 dB.
- One pass at 7.5 m and 30 km/h: SEL ≈ 86.5 dB(A).
- Beside the road, by day only: 26 passes give Lden ≈ 51 dB; 50 passes (all through the same village) give ≈ 54 dB. WHO: 53 dB.
- One load at night (2 passes in 8 h): Lnight ≈ 44.9 dB. WHO: 45 dB.
- A level within 1 dB of the value it is compared with is shown with one decimal.
Water
Illustrative simulation using official data and scenarios from real plants; it does not replace a hydrogeological study for the project.
The water model is illustrative: it runs planning numbers on official data and on scenarios from real plants, not on project figures, which have not been disclosed. It does not replace a hydrogeological study. The server and the browser run the same calculations, and every calculated number on the water pages comes from the parameters below; none is typed by hand.
The plant's water, drawn evenly through the year (Assumption):
T (t a year) = loads a day × t per load × delivery days a year
W (m³ a year) = T × m³ of water per tonne
m³ a day = W ÷ 365
continuous L/s = m³ a day ÷ 86.4
In people and in supply networks. The two parishes are done like the two villages, and the Guarda network's real losses like its authorised consumption:
people = m³ a day ÷ (L per person per day ÷ 1000)
× villages = m³ a day ÷ (residents of the two villages × L per person per day ÷ 1000)
× Avelãs network = m³ a day ÷ m³ a day delivered by the Avelãs de Ambom network
% of Guarda = 100 × m³ a day ÷ authorised consumption in Guarda (m³ a day)
In boreholes:
boreholes = m³ a day ÷ (borehole yield in L/s × 86.4)
In recharge. The recharge of a circle is the recharge depth times the circle's area, and the plant's share is one year of water divided by that recharge. In the sensitivity, r is the sensitivity recharge:
V (m³ a year) = r (mm a year) ÷ 1000 × π × radius² (m²)
V of the whole groundwater body (m³ a year) = total recharge (hm³ a year) × 10⁶
% of recharge = 100 × W ÷ V
The water year, within 1 km, at the end of each month:
recharge so far = Σ (the month's part of the recharge × V within 1 km)
water drawn so far = m³ a day × days elapsed
If the plant uses the mains (Assumption), the recharge and borehole comparisons do not apply and are not shown; the share of Guarda's consumption and losses remains.
Reference evapotranspiration (ETo), by the Hargreaves-Samani method, with Guarda's monthly mean temperatures:
ETo (mm in the month) = 0.0023 × (TT + 17.8) × √(TX − TN) × Ra × days in the month
TT, TX and TN are the month's mean, maximum and minimum temperatures (°C); Ra is the radiation reaching the top of the atmosphere at 40.53° N, in mm of water a day, computed with the FAO-56 procedure. We checked the method with Guarda's 1971–2000 temperatures: it gives 852.7 mm a year, against 850.5 mm by the same method and 873.1 mm by the Penman-Monteith method in a published study of Guarda.
Soil-water model, month by month, used only to split the recharge across the months. The soil holds up to 100 mm of water (Assumption). In each month:
actual evapotranspiration = min(ETo, rain + water held in the soil)
Water that does not fit in the soil runs off or soaks in. At the site that happens only from November to March, and the year's recharge is split across those months in proportion to each month's surplus. The surplus (about 247 mm a year at the site, our calculation) is runoff plus recharge, so we do not use it as recharge.
Summer deficit, with Almeidinha's rain and Guarda's ETo (Assumption):
deficit = sum from June to September of (ETo − rain)
Model parameters
| Parameter | Value |
|---|---|
| Loads a day (those of the noise and traffic model) | 25 (Assumption) planning assumption; the real number has not been disclosed |
| Load per truck | 25 t (Assumption) |
| Delivery days a year | 365 (Assumption) |
| Feedstock a year (calculated: loads × load × days) | 228,125 t a year (Assumption) |
| Water per tonne of feedstock, by plant type | Livestock slurry and manure (Sousel-like): 0.084 m³/t Manure-led mixed agricultural and agro-industrial feedstock with hygienisation (Torres Novas-like): 0.170 m³/t European average, mostly bio-waste (JRC survey): 0.563 m³/t (Assumption) design figures from other plants, not metered use |
| Household use per person (Guarda, 2023) | 90.3 L a day (Assumption) |
| Residents: the two villages / the two parishes (2021 Census) | 175 / 947 |
| Water delivered by the Avelãs de Ambom network | 4 m³ a day |
| Guarda: authorised consumption / real network losses (2023) | 6,050 / 2,370 m³ a day |
| Average recharge of groundwater body PT03A0X1, applied to the site | 41.7 mm a year (Assumption) |
| Total recharge of groundwater body PT03A0X1 | 781.92 hm³ a year |
| Sensitivity recharge (Tejo-basin regression, at the site's rainfall) | 126 mm a year (Assumption) |
| Split of recharge across the months (soil-water model) | Jan 31 %, Feb 26 %, Mar 1 %, Nov 9 %, Dec 33 % (Assumption) |
| Rain at the site: Almeidinha monthly means, 1959–98 (year total) | 786.9 mm a year (Assumption) |
| Reference evapotranspiration: Hargreaves-Samani with Guarda's 1971–2000 temperatures (year total) | 852.6 mm a year (Assumption) |
| Rain at Guarda, 1991–2020 normal (reference; not used in the plant's numbers) | 964.3 mm a year |
| Water scarcity WEI+ of the Côa sub-basin (1989–2015): over the year; month by month | 59 %; Jan 24 %, Feb 29 %, Mar 40 %, Apr 46 %, May 68 %, Jun 85 %, Jul 93 %, Aug 96 %, Sep 93 %, Oct 63 %, Nov 43 %, Dec 25 % |
| Granite borehole yield: median / mean, pumped 24 hours a day | 0.28 / 0.54 L/s (Assumption) |
| Parcel centre and comparison circles | 40.6208 N, 7.2285 W, ±50 m; circles of 1 and 5 km (Assumption) |
(Assumption) = assumption, not a measured or official value for the site. The numbers on the water pages are calculated from these values.
The three scenarios, with the values above
| Result | Low: Sousel-like | Central: Torres Novas-like | High: European average |
|---|---|---|---|
| Water a year (m³) | 19,163 | 38,781 | 128,434 |
| Water a day (m³) | 52.5 | 106 | 352 |
| Continuous flow (L/s) | 0.61 | 1.2 | 4.1 |
| People with the same household use | 581 | 1,177 | 3,897 |
| Times the household use of the two villages | 3.3 | 6.7 | 22.3 |
| Times the household use of the two parishes | 0.61 | 1.2 | 4.1 |
| Times the Avelãs de Ambom network | 13.1 | 26.6 | 88.0 |
| % of authorised consumption in Guarda | 0.87 | 1.8 | 5.8 |
| % of the Guarda network's real losses | 2.2 | 4.5 | 14.8 |
| Median granite boreholes | 2.2 | 4.4 | 14.5 |
| Mean granite boreholes | 1.1 | 2.3 | 7.5 |
| % of recharge within 1 km | 14.6 | 29.6 | 98.0 |
| % of recharge within 5 km | 0.59 | 1.2 | 3.9 |
| % of the whole groundwater body's recharge | 0.0025 | 0.0050 | 0.016 |
| % of recharge within 1 km, with the sensitivity recharge | 4.8 | 9.8 | 32.4 |
Scenarios (Assumption), not project figures. Here with one decimal (none from 100 up), or two significant figures below 1; on the pages they are rounded (m³ a day to whole units from 10, people to tens from 100, counters to hundreds of m³). If the plant uses the mains (Assumption), the recharge and borehole rows do not apply.
Recharge sensitivity (Assumption): with 126 mm a year instead of 41.7 mm, the “Central: Torres Novas-like” scenario could draw 9.8 % of the recharge within 1 km, instead of 29.6 %, and the “High: European average” scenario 32.4 %, instead of 98.0 %. We show this sensitivity because it is the recharge value most favourable to the plant that we found.
Recent years and Guarda's normal
The recent-years mean, 1,080 mm a year, averages the 12 hydrological years (October to September) with a Guarda total in our data: 2014/15, 2015/16, 2016/17, 2017/18, 2018/19, 2019/20, 2020/21, 2021/22, 2022/23, 2023/24, 2024/25, 2025/26. Each total adds up the monthly values of IPMA's bulletins, which are provisional and come from an automatic station. The 1991–2020 normal we compare them with, 964.3 mm, comes from station 683 and is a hybrid series, partly observed and partly modelled; the earlier normals are from another station. So the comparison is an indication, not a measured trend.
Choices between sources that disagree
- Recharge. We use the official average recharge of groundwater body PT03A0X1 everywhere: 781.92 hm³ a year over 18,735.92 km², that is 41.7 mm a year. It is the only official figure for this body, computed by APA with a documented method. We show one sensitivity, 126 mm a year: LNEC's regression for the Maciço Antigo of the Tejo basin, Eb = 0.5210 × P − 284 (in mm), at the rainfall chosen for the site, 786.9 mm. It was not fitted for this basin; we show it because it is the value most favourable to the plant. We do not use as recharge the rule of “about 10 % of rainfall” (we found it only in a search summary) or the surplus of the soil-water model, which includes runoff.
- Rain at the site. We use about 730–790 mm a year: the two long-term means of the Almeidinha rain gauge, at 871 m, in the same Douro basin and on a similar plateau, 727.6 mm in 1971–2000 (SNIRH) and 786.8 mm in 1959–98 (GHCN). The closer gauges have gappy or inhomogeneous series. The mean of the Côa sub-basin, 670 mm in 1930–2015, is also below Guarda's rainfall. Month-by-month calculations use Almeidinha's 1959–98 monthly means, 786.9 mm over the year: the top of the range, so as not to overstate dryness.
- Guarda's normal. The 1991–2020 normal, 964.3 mm at station 683 at 1001 m, is used only to show the shape of the climate through the year, labelled as the city's. It is a hybrid series, partly observed and partly modelled, and the earlier normals come from another station (082): 882.0 mm in 1971–2000. The rise between normals is not a trend. The recent-year totals add up provisional values from IPMA's monthly bulletins.
- Use per person. 90.3 L per person per day: household use billed in Guarda in 2023. It is the fair comparison with what a person uses at home. A per-person figure with every authorised use (commerce and public uses included) would give fewer people. The per-person figure of the Avelãs de Ambom network rests on a total rounded to whole units and may reflect private wells and gardens; we use only the network's total, in the “× Avelãs network” comparison.
- One set of scenarios. The three plant types (low, central, high) replace the hypothetical ranges of the research reports. We set aside an alternative with less feedstock (20 t loads on 260 days a year), because the noise and traffic model treats the loads a day as a floor and less feedstock would not be the cautious choice.
- Abstraction register and village sources. APA's abstraction register shows no public-supply abstraction within 5 km of Avelãs de Ambom or Pêra do Moço; the nearest is 5.5 km from Avelãs, in the Mondego groundwater body. Yet Avelãs de Ambom and Rocamondo have their own groundwater sources. Both are true: the register is incomplete. So the register's sums are a minimum, and where the village sources are is on the list of what to ask.
- Site centre. We use the centre of the parcel outline MOV.AP measured, placed on DGT's official satellite image, ±50 m, not the midpoint between the villages. We re-queried APA's and LNEG's layers at this centre on 30.10.2026: the basin (Ribeira de Massueime), the groundwater body and the geology are the same; within 1 km there are 3 registered farm wells, drawing about 3,000 m³ a year.
- “Zona de Exploração de água”. Local residents know of it, but we could not find it in any official register we checked. We treat it as a zone not yet identified, not as a public or protected water source.
- Status of the groundwater body. We use the 3rd cycle of the management plans (2022–2027), the one in force: overall status “Good”, quantitative and chemical status “Good but at risk”. The 1st-cycle figures are history only.
- Basin of the site. According to APA's layers, the parcel drains to the Douro, Côa sub-basin; the boundary with the Mondego basin is about 0.9 km west of Avelãs de Ambom. Guarda's station lies on the Mondego side: one more reason not to use the city's rain as the site's.
Assumptions
None of these values is measured or official for the site. Each carries a (Assumption) wherever it appears on the site.
- 25 truck loads a day (Assumption): a planning assumption, not a project figure; probably a floor.
- All 25 loads bring in feedstock (Assumption); digestate going out is not counted in them.
- 25 t per load (Assumption), the figure in the Ferreira do Alentejo environmental impact study.
- 365 delivery days a year (Assumption), which gives 228,125 t of feedstock a year (625 t a day).
- The plant type and the water per tonne (Assumption) (0.084 / 0.170 / 0.563 m³/t): design figures from other plants; this plant's feedstock mix has not been disclosed.
- Water drawn evenly through the year (Assumption) (the year's total divided by 365); the model has no seasonal peak.
- The water comes from a borehole on site (Assumption), for the recharge, borehole and summer comparisons. If the plant uses the mains, those comparisons do not apply.
- The official average recharge of the groundwater body, 41.7 mm a year, applies to the site (Assumption).
- The 126 mm a year recharge sensitivity (Assumption) transfers a regression made in the Tejo basin to the Douro.
- Site = parcel centre, 40.6208 N, 7.2285 W, ±50 m (Assumption), from the outline MOV.AP measured, placed on DGT's official satellite image; there is no official georeferenced document of the parcel. This point sets the 1 and 5 km circles.
- Rain at the site ≈ the Almeidinha rain gauge's (Assumption): about 730–790 mm a year in the two long-term means; in the calculations, the 1959–98 monthly means (786.9 mm a year).
- Evapotranspiration at the site ≈ Guarda's, by Hargreaves-Samani with the 1971–2000 temperatures (Assumption). The site's is probably a little higher, because the site is lower and warmer.
- Soil available water capacity of 100 mm (Assumption) in the soil-water model.
- The 90.3 L per person per day applies to the villagers (Assumption): it is a municipal average.
- Village household use = census residents × 90.3 L a day (Assumption): 15.8 m³ a day for the two villages.
- Borehole yield = the median of granite boreholes in the Mondego basin, 0.28 L/s (mean 0.54 L/s), pumped 24 hours a day (Assumption).
- APA's registered abstractions represent existing use (Assumption); they are a known minimum, because the register is incomplete.
- Pêra do Moço's water comes from the Caldeirão supply zone, in every hamlet of the parish (Assumption): the notice uses parish-level names.
- Position and nature of the “Zona de Exploração de água” (Assumption): the 352.3 m distance was measured by MOV.AP, the centre (40.6161 N, 7.2306 W) is estimated at ±50 m, and what the zone is remains unidentified.
The map
- Base map. OpenStreetMap, served from our own server (no third-party requests).
- Projects. Most project coordinates are approximate (the centre of the municipality or of the known facility) and are drawn with a hollow marker.
- Guarda parcel. The outline comes from MOV.AP's measurements on satellite imagery, placed on DGT's official satellite image, with an uncertainty of about ±50 m; it has not yet been confirmed by an official document.
- Zones. The rings show distances from other plants, other countries' rules and generic studies. Each one says: "Indicative zone — not a model of this plant".
The vote
This vote is not an opinion poll (sondagem) and does not allow scientific generalisation.
- Who runs it. MOV.AP, a citizens' movement that opposes the project. We say so next to the question.
- The question. "Do you agree with a biomethane plant being built between Avelãs de Ambom and Pêra do Moço?", with the answers Yes, No and Don't know.
- One person, one vote. A vote counts only once confirmed with a 6-digit code sent by email. We keep only an irreversible digest of the email, in a table separate from the votes, and delete it when the vote closes.
- Results by parish. Each person says where they live, so local residents, the rest of the Guarda municipality and everyone else can be shown separately.
- Age. 16 or over, self-declared.
- No margin of error. People choose to vote; the results only represent the opinion of those who answered. We follow the transparency rules of the American public opinion research association.
Sources and confidence
High: primary document read directly. Medium: official or secondary source summarised, or a case that differs from Guarda. Low: indirect source or our own inference.
If you find a mistake, write to [email protected] with the source. We correct it and record the date of the correction.
Sources on this page
- ALOHA (Areal Locations of Hazardous Atmospheres) 5.4.4 Technical Documentation, NOAA Technical Memorandum NOS OR&R 43
- Die Entwicklung des Ausbreitungsmodells AUSTAL2000G (Berichte zur Umweltphysik 5, 2.ª edição)
- Arrêté du 12 août 2010 relatif aux prescriptions générales applicables aux installations classées de méthanisation relevant du régime de l'enregistrement (rubrique 2781), version consolidée
- Climatologia do vento no local, 2021–2025: reanálise ERA5 através da Open-Meteo Historical Weather API (16 setores, velocidade, dia/noite)
- Odour impact assessment, Bio Agrigas (Mullingar): Odour Monitoring Ireland report 2011A148(1)
- Odour emissions impact of on-farm biogas production with co-digestion: a case study in four European farms
- Bayle et al. (2018), Chemical Engineering Transactions, vol. 68, pp. 79–84: emissões de odor em três unidades de metanização em França
- Guidance on the assessment of odour for planning, version 1.1
- Odour Impact by Field Inspections: Method and Results from an Agricultural Biogas Facility
- ISO 9613-2: atenuação do som na propagação ao ar livre (método simplificado)
- Decreto-Lei n.º 9/2007: Regulamento Geral do Ruído (art. 3, 11 e 13, anexo I)
- REC: Noise Impact Assessment, Coursers Farm AD (AC100899-1R3)
- Redmore Environmental: Noise Impact Assessment, Rufford AD (ref. 1288-2)
- Aviso n.º 30765/2025/2: 1.ª Revisão do PDM da Guarda, art. 34 (zonamento acústico)
- EPA Irlanda: documento de licença com ruído de fundo rural noturno (LA90 30–31 dB(A))
- Environmental Noise Guidelines for the European Region (2018): tráfego rodoviário, Lden 53 dB e Lnight 45 dB
- Regulamento (UE) n.º 540/2014, anexo III: limites de ruído de veículos (N3, medição a 7,5 m)
- FHWA: níveis de ruído de passagem de camiões pesados (Lmax a 50 pés)
- Ata da reunião ordinária da Câmara Municipal da Guarda de 19 de junho de 2026 (Ponto 18, Proposta VPCM n.º 10/2026)
- Crop evapotranspiration: guidelines for computing crop water requirements (FAO Irrigation and Drainage Paper 56)
- Andrade e Ventura: Hargreaves-Samani vs Penman-Monteith em 20 estações portuguesas, Finisterra LIX(127) e33850
- EIA da Unidade de Produção de Biometano de Ferreira do Alentejo: Aditamento (T2025-028-02-EX-ENV-EIA-ADIT-0), AIA 599
- Parecer da Comissão de Avaliação, procedimento de AIA n.º 3857: Unidade de Biometano de Sousel
- UPB Torres Novas: Estudo de Impacte Ambiental, Aditamento (T2025-0064-02-EIA-UPB-TRN-ADIT-00)
- Best Available Techniques (BAT) Reference Document for Waste Treatment (JRC113018)
- Relatório Indicadores e Dados 2023 (RASARP 2024)
- População residente (estimativas anuais), indicador 0012918
- População residente por lugar (censitário), sexo e grupo etário: Censos 2021, indicador 0011790
- População residente por local de residência, sexo e grupo etário: Censos 2021 e 2011, indicador 0011609
- RASARP 2026, Vol. 2, Anexo III: Dados da qualidade da água (baixa), 2025
- Plano de Gestão da Região Hidrográfica do Douro (RH3), 3.º ciclo: Fichas de Massa de Água, Volume I
- Aquíferos das Bacias Hidrográficas do Rio Tejo e das Ribeiras do Oeste (capítulo do LNEC, M. M. Oliveira)
- GHCN-Daily POE00100963 Almeidinha (fonte ECA&D), 1959–1998
- Normais climatológicas da Guarda (082), 1971–2000
- Normal Climatológica da Guarda 1991–2020 (v1.0)
- Plano de Gestão da Região Hidrográfica do Douro (RH3), 3.º ciclo: Parte 2, Volume B
- Sistemas Aquíferos de Portugal Continental: Maciço Antigo, Introdução e Zona Centro-Ibérica (Almeida, Mendonça, Jesus e Gomes)
- MOV.AP: medições sobre imagem de satélite, outubro de 2026 (distâncias do limite da parcela à zona de exploração de água, quintas e aldeias)
- Boletim Climatológico Mensal, Portugal Continental, janeiro de 2013 a setembro de 2026
- SNIRH, dados de base: Almeidinha (10O/02UG), precipitação anual e mensal
- SNIRH, dados de base: precipitação anual em Codeceiro, Sobral da Serra, Freixedas, Maçainhas, Mourilhe, Pínzio e Ramela
- Planos de Gestão de Região Hidrográfica, 3.º ciclo: serviços ArcGIS (massas de água, pressões, estado, WEI)
- Qualidade da água: zonas de abastecimento do concelho da Guarda (população servida e origem da água)
- DGT: OrtoSat2023, ortoimagens de satélite de 2023 em cor verdadeira (serviço WMS)
- Carta Geológica de Portugal à escala 1:200 000 (serviço de mapas GeologiaUnica200k)
- MOV.AP: conhecimento local dos moradores sobre a «Zona de Exploração de água» a sul da parcela
- Plano de Gestão da Região Hidrográfica do Douro (RH3), 3.º ciclo: Parte 2, Volume A
- Dados do controlo da qualidade da água para consumo humano: Zona de Abastecimento Caldeirão, 2.º trimestre de 2026
- OpenStreetMap: localização das aldeias de Avelãs de Ambom, Pêra do Moço, Rocamondo, Martianes e Verdugal e da igreja de Pêra do Moço
- AAPOR Transparency Initiative: disclosure elements
ALOHA (Areal Locations of Hazardous Atmospheres) 5.4.4 Technical Documentation, NOAA Technical Memorandum NOS OR&R 43
Die Entwicklung des Ausbreitungsmodells AUSTAL2000G (Berichte zur Umweltphysik 5, 2.ª edição)
Arrêté du 12 août 2010 relatif aux prescriptions générales applicables aux installations classées de méthanisation relevant du régime de l'enregistrement (rubrique 2781), version consolidée
Climatologia do vento no local, 2021–2025: reanálise ERA5 através da Open-Meteo Historical Weather API (16 setores, velocidade, dia/noite)
Odour impact assessment, Bio Agrigas (Mullingar): Odour Monitoring Ireland report 2011A148(1)
Odour emissions impact of on-farm biogas production with co-digestion: a case study in four European farms
Bayle et al. (2018), Chemical Engineering Transactions, vol. 68, pp. 79–84: emissões de odor em três unidades de metanização em França
Guidance on the assessment of odour for planning, version 1.1
Odour Impact by Field Inspections: Method and Results from an Agricultural Biogas Facility
ISO 9613-2: atenuação do som na propagação ao ar livre (método simplificado)
- No public link
Decreto-Lei n.º 9/2007: Regulamento Geral do Ruído (art. 3, 11 e 13, anexo I)
REC: Noise Impact Assessment, Coursers Farm AD (AC100899-1R3)
Redmore Environmental: Noise Impact Assessment, Rufford AD (ref. 1288-2)
- No public link
Aviso n.º 30765/2025/2: 1.ª Revisão do PDM da Guarda, art. 34 (zonamento acústico)
EPA Irlanda: documento de licença com ruído de fundo rural noturno (LA90 30–31 dB(A))
Environmental Noise Guidelines for the European Region (2018): tráfego rodoviário, Lden 53 dB e Lnight 45 dB
Regulamento (UE) n.º 540/2014, anexo III: limites de ruído de veículos (N3, medição a 7,5 m)
FHWA: níveis de ruído de passagem de camiões pesados (Lmax a 50 pés)
Ata da reunião ordinária da Câmara Municipal da Guarda de 19 de junho de 2026 (Ponto 18, Proposta VPCM n.º 10/2026)
Crop evapotranspiration: guidelines for computing crop water requirements (FAO Irrigation and Drainage Paper 56)
Andrade e Ventura: Hargreaves-Samani vs Penman-Monteith em 20 estações portuguesas, Finisterra LIX(127) e33850
EIA da Unidade de Produção de Biometano de Ferreira do Alentejo: Aditamento (T2025-028-02-EX-ENV-EIA-ADIT-0), AIA 599
Parecer da Comissão de Avaliação, procedimento de AIA n.º 3857: Unidade de Biometano de Sousel
UPB Torres Novas: Estudo de Impacte Ambiental, Aditamento (T2025-0064-02-EIA-UPB-TRN-ADIT-00)
Best Available Techniques (BAT) Reference Document for Waste Treatment (JRC113018)
Relatório Indicadores e Dados 2023 (RASARP 2024)
População residente (estimativas anuais), indicador 0012918
População residente por lugar (censitário), sexo e grupo etário: Censos 2021, indicador 0011790
População residente por local de residência, sexo e grupo etário: Censos 2021 e 2011, indicador 0011609
RASARP 2026, Vol. 2, Anexo III: Dados da qualidade da água (baixa), 2025
Plano de Gestão da Região Hidrográfica do Douro (RH3), 3.º ciclo: Fichas de Massa de Água, Volume I
Aquíferos das Bacias Hidrográficas do Rio Tejo e das Ribeiras do Oeste (capítulo do LNEC, M. M. Oliveira)
GHCN-Daily POE00100963 Almeidinha (fonte ECA&D), 1959–1998
Normais climatológicas da Guarda (082), 1971–2000
Normal Climatológica da Guarda 1991–2020 (v1.0)
Plano de Gestão da Região Hidrográfica do Douro (RH3), 3.º ciclo: Parte 2, Volume B
Sistemas Aquíferos de Portugal Continental: Maciço Antigo, Introdução e Zona Centro-Ibérica (Almeida, Mendonça, Jesus e Gomes)
MOV.AP: medições sobre imagem de satélite, outubro de 2026 (distâncias do limite da parcela à zona de exploração de água, quintas e aldeias)
- No public link
Boletim Climatológico Mensal, Portugal Continental, janeiro de 2013 a setembro de 2026
SNIRH, dados de base: Almeidinha (10O/02UG), precipitação anual e mensal
SNIRH, dados de base: precipitação anual em Codeceiro, Sobral da Serra, Freixedas, Maçainhas, Mourilhe, Pínzio e Ramela
Planos de Gestão de Região Hidrográfica, 3.º ciclo: serviços ArcGIS (massas de água, pressões, estado, WEI)
Qualidade da água: zonas de abastecimento do concelho da Guarda (população servida e origem da água)
DGT: OrtoSat2023, ortoimagens de satélite de 2023 em cor verdadeira (serviço WMS)
Carta Geológica de Portugal à escala 1:200 000 (serviço de mapas GeologiaUnica200k)
MOV.AP: conhecimento local dos moradores sobre a «Zona de Exploração de água» a sul da parcela
- No public link