Evaporation in Brazilian dryland reservoirs: Spatial variability and impact of riparian vegetation

Rodrigues, Ítalo Sampaio; Costa, Carlos Alexandre Gomes; Raabe, Armin; Araújo, José Carlos de

doi:10.1016/j.scitotenv.2021.149059

Cited by 19 publications

(9 citation statements)

References 89 publications

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“…Abdelrady, Timmermans 45 , who developed AquaSEBS, reported RMSE’s of 20–35 W·m −2 and 1.5 mm·day −1 , depending on site and measurement method; they reported a high r 2 of 0.98 at one site though the r 2 for their sensible heat flux was 0.70. Rodrigues, Costa 98 and Rodrigues, Costa 37 used AquaSEBS across multiple sites and reported RMSE’s of 0.81–1.25 mm·day −1 in the former and 0.03–0.58 mm·day −1 in the latter, with r 2 ’s of 0.51–0.65 and 0.32–0.63, respectively. Our results compare similarly to all these studies (outside of the anomalous high r 2 in Abdelrady, Timmermans 45 ).…”

Section: Discussionmentioning

confidence: 99%

“…In conjunction with high frequency in situ measurements, this combination can be a powerful pair both to produce a fused spatiotemporal capability, as well as provide calibration of the satellite data 9 , 34 . Still, there are challenges with remotely based evaporation estimates both in terms of retrieval mathematical formulation and physical process assumptions, as well as available data to drive those models 35 – 37 . Numerous models have been developed to estimate open water evaporation 38 – 46 .…”

Section: Introductionmentioning

confidence: 99%

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Remotely sensed terrestrial open water evaporation

Fisher

Dohlen

Halverson

et al. 2023

Sci Rep

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Terrestrial open water evaporation is difficult to measure both in situ and remotely yet is critical for understanding changes in reservoirs, lakes, and inland seas from human management and climatically altered hydrological cycling. Multiple satellite missions and data systems (e.g., ECOSTRESS, OpenET) now operationally produce evapotranspiration (ET), but the open water evaporation data produced over millions of water bodies are algorithmically produced differently than the main ET data and are often overlooked in evaluation. Here, we evaluated the open water evaporation algorithm, AquaSEBS, used by ECOSTRESS and OpenET against 19 in situ open water evaporation sites from around the world using MODIS and Landsat data, making this one of the largest open water evaporation validations to date. Overall, our remotely sensed open water evaporation retrieval captured some variability and magnitude in the in situ data when controlling for high wind events (instantaneous: r2 = 0.71; bias = 13% of mean; RMSE = 38% of mean). Much of the instantaneous uncertainty was due to high wind events (u > mean daily 7.5 m·s−1) when the open water evaporation process shifts from radiatively-controlled to atmospherically-controlled; not accounting for high wind events decreases instantaneous accuracy significantly (r2 = 0.47; bias = 36% of mean; RMSE = 62% of mean). However, this sensitivity minimizes with temporal integration (e.g., daily RMSE = 1.2–1.5 mm·day−1). To benchmark AquaSEBS, we ran a suite of 11 machine learning models, but found that they did not significantly improve on the process-based formulation of AquaSEBS suggesting that the remaining error is from a combination of the in situ evaporation measurements, forcing data, and/or scaling mismatch; the machine learning models were able to predict error well in and of itself (r2 = 0.74). Our results provide confidence in the remotely sensed open water evaporation data, though not without uncertainty, and a foundation by which current and future missions may build such operational data.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Remotely sensed terrestrial open water evaporation

Fisher

Dohlen

Halverson

et al. 2023

Sci Rep

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“…The presence of dryland wetlands allows arid or semi‐arid riverscapes to exist as isolated refugia during periods of extreme drought, with low flow channels providing short‐term connections between otherwise isolated sections of the river network. Additionally, riparian vegetation presence reduces the rates of evaporation, contributing to water retention in dryland systems (Rodrigues et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Expansive, positive changes to fish habitat diversity following the formation of a valley plug in a degraded desert river

Remiszewski,

Budy,

Macfarlane

2023

River Research & Apps

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Widespread hydrologic alterations have simplified in‐stream habitats in rivers globally, driving population declines and extirpations of many native fishes. Here, we examine how rapid geomorphic change in a historically degraded desert river has influenced habitat diversification and ecosystem persistence. In 2010, a large reach of the degraded and simplified lower San Rafael River (SRR), Utah, was impacted by the formation of a valley plug and began to shift from a homogenous, single‐thread channel to a complex, multi‐threaded riverscape. We combined field measurements and drone‐collected imagery to document changes in fish habitat due to the valley plug. Our results demonstrate that in 2021, the affected reach was more diverse than any other stream reach along the SRR, containing 641% more diverse habitat (e.g., pools, riffles, and backwaters) than what was measured in 2015. The plug reach also retained water for periods beyond what was expected during seasonal drying, with the total extent of inundation within the riverscape increasing by over 2800%. Since the formation of the valley plug, riparian habitat has increased by 230% and channel networks have expanded to more than 50 distinct channels throughout the zone of influence. Our results provide evidence of successful self‐restoration in a formerly highly degraded reach of desert river, and encourage new methods of desert river restoration. We aim to inform the use of large‐scale, disruptive restoration actions like intentional channel occlusions, with the goal of mitigating the impacts of simplification and increasing habitat persistence in the face of exacerbated aridity in the desert Southwest.

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“…In another study, N.C. Mbangiwa et al [16] simulated and predicted the evapotranspiration of dry land soybean in KwaZulu Natal, South Africa, which was useful for crop water management. Italo Sampaio Rodrigues et al [17] analyzed the impact of dry land vegetation on reservoir evaporation in Brazil and quantified the uncertain factors of reservoir evaporation. Many studies have focused on small-scale areas, relying on a large amount of flux observations and meteorological station data to simulate and calculate ET and its components.…”

Section: Introductionmentioning

confidence: 99%

Effects of Human Activities on Evapotranspiration and Its Components in Arid Areas

Liu

GUI

Yin

et al. 2023

IJERPH

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With the increasing impact of human activities on the environment, evapotranspiration (ET) has changed in arid areas, which further affects the water resources availability in the region. Therefore, understanding the impact of human activities on ET and its components is helpful to the management of water resources in arid areas. This study verified the accuracy of Fisher’s model (PT-JPL model) for ET estimation in southern Xinjiang, China by using the evaporation complementarity theory dataset (AET dataset). The ET and the evapotranspiration components (T:E) of six land-use types were estimated in southern Xinjiang from 1982 to 2015, and the impact of human activities on ET was analyzed. In addition, the impact of four environmental factors (temperature (Temp), net radiation (Rn), relative humidity (RH), and NDVI) on ET were evaluated. The results showed that the calculated ET values of the PT-JPL model were close to the ET values of the AET dataset. The correlation coefficient (R2) was more than 0.8, and the NSE was close to 1. In grassland, water area, urban industrial and mining land, forest land, and cultivated land, the ET values were high, and in unused land types, the ET values were the lowest. The T:E values varied greatly in urban industrial and mining land, forest land, and cultivated land, which was due to the intensification of human activities, and the values were close to 1 in summer in recent years. Among the four environmental factors, temperature largely influenced the monthly ET. These findings suggest that human activities have significantly reduced soil evaporation and improved water use efficiency. The impact of human activities on environmental factors has caused changes in ET and its components, and appropriate oasis expansion is more conducive to regional sustainable development.

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Evaporation in Brazilian dryland reservoirs: Spatial variability and impact of riparian vegetation

Cited by 19 publications

References 89 publications

Remotely sensed terrestrial open water evaporation

Remotely sensed terrestrial open water evaporation

Expansive, positive changes to fish habitat diversity following the formation of a valley plug in a degraded desert river

Effects of Human Activities on Evapotranspiration and Its Components in Arid Areas

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