Evaluation of ecological buffer zone based on landscape pattern for non-point source pollution control: A case study in Hanjiang River basin, China

Journal of Hydrology, Год журнала: 2023, Номер 626, С. 130341 - 130341

Опубликована: Окт. 13, 2023

Язык: Английский

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Factors affecting mobility/export of particle-bound stable elements after erosive rainfalls in agroforestry Mediterranean catchments of Aragón (Spain)

Geomorphology, Год журнала: 2024, Номер 451, С. 109099 - 109099

Опубликована: Фев. 12, 2024

The composition of sediment fluxes caused by erosion can vary greatly both spatially and temporally, causing different impacts on water bodies. process is mainly driven soil rainfall characteristics as well land use. aim this research to evaluate the combined effect these factors in a mountain agroforestry system, analysing relationship generated after flooding events with impact analyses were based data recorded three catchments Mediterranean climate. sediments collected 21 seasonal campaigns their assessed taking into account main uses each catchment. results confirm differences particle mobilization high low intensity higher croplands compared other dominant uses. amount trapped catchment largest area cropland almost doubled catchments. Clay organic carbon lower than original sources, likely due content soils more susceptible washing out finer material runoff under amount/intensity precipitation. Differences observed between export stable elements, general enrichment Al, Be, B, Cu, Mn, S, Sr Zn, reaching highest values for Zn. elemental differed according thus Zn or Mn events, while elements like Be enriched events. These variable patterns evidence complex interplay involved key role bounds sizes matter.

Язык: Английский

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Modeling pesticides and ecotoxicological risk assessment in an intermittent river using SWAT

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Март 16, 2024

Abstract The present work aimed to predict the fate of two pesticides, copper (Cu) and glyphosate in a Mediterranean basin with an intermittent river assess ecotoxicological risk related their presence water bodies coupling field measurements streamflow pesticide concentrations, eco-hydrological model. Soil Water Assessment Tool (SWAT) model was calibrated and, subsequently used predicted environmental concentrations pesticides surface waters. Cu assessed at reach scale by using Toxicity Exposure Ratio approach (TER). Measurements (< 0.5 μg l −1 ) exceeded maximum European threshold quality standards for (EQS) 0.1 . High were wet season September, when is mostly vineyards olive grove productions. Acute (TER < 100) associated detected several reaches. 6.5 ), mainly as fungicide vineyards, results assessment revealed that November January critical months during which most reaches showed chronic Cu.

Язык: Английский

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Best Management Practices for Reducing Nutrient Loads Under Diverge Hydrological Conditions: A Case Study in an Agricultural Watershed in Southwest China

Опубликована: Янв. 1, 2025

Язык: Английский

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Modelling the impact of climate change on runoff and sediment yield in Mediterranean basins: the Carapelle case study (Apulia, Italy)

Frontiers in Water, Год журнала: 2025, Номер 7

Опубликована: Март 13, 2025

Introduction This study analyzes the impact of climate change on streamflow and sediment yield in Carapelle basin, a Mediterranean watershed located Apulia Region Italy. Methods Three model projections (CMCC, MPI, EC-EARTH) under CMIP6 SSP2-4.5 scenario were bias-corrected evaluated using statistical measures to ensure enhanced fit with observed data. The Soil Water Assessment Tool (SWAT) was implemented simulate hydrology yield. calibrated validated measured load data from 2004–2011, demonstrating satisfactory performance for both parameters. Baseline conditions (2000–2020) compared future (2030–2050). Results Climate 2030-2050 indicated temperature increases up 1.3°C average annual rainfall decreases 38% baseline. These changes resulted reduced water across all models. CMCC projected highest reduction mean flow (67%), smaller reductions MPI (35%) EC-EARTH (7%). Correspondingly, 52.8% (CMCC), 41.7% (MPI), 18.1% (EC-EARTH). Despite these overall reductions, spatial analysis revealed that soil erosion remained critical (sediment &gt;10 t ha −1 ) certain areas, particularly steep slopes wheat cultivation. Discussion Integrating considerations into management strategies is essential sustaining river basins conditions. Adaptation such as BMPs NBSs should be reduce mitigate impacts.

Язык: Английский

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Coupling SWAT+ and GOTM-WET models to assess agricultural management practices for mitigating harmful algal blooms in Mar Menor, Spain

Journal of Environmental Management, Год журнала: 2025, Номер 380, С. 125033 - 125033

Опубликована: Март 23, 2025

We analysed the effectiveness of agricultural best management practices (BMPs) for mitigating harmful algal blooms (HABs) in Mar Menor lagoon, Spain, by coupling SWAT + catchment and GOTM-WET lake models. compared different BMP scenarios, including "vegetative filter strips", "contour farming", "fertilizer reduction", "crop rotation", their combination reducing high chlorophyll a (Chl-a) events over period 2003-2022. All BMPs significantly reduced nutrient inputs entering which limited formation HABs. The scenario that combined all was most effective controlling HABs, decreasing numbers days with HABs 81 %, Chl-a 50 % during periods This mainly explained crop rotation, fertilizer reduction vegetative strips differentially (e.g. rotation nitrogen 47.4 phosphorus 31.8 %). Contour farming least inputs, thus (1.6 5.8 HAB). results suggest dynamics are controlled interactive effects forms, where orthophosphate plays key role initiating is then maintained concentrations. research underscores relevance effectively driven eutrophication coastal vulnerable aquatic ecosystems like Menor. Coupling SWAT+ models, moved beyond solely simulations allowed incorporation lagoon responses to HAB prevention.

Язык: Английский

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Suspended Sediment Load Estimation Using Sediment Rating Curves in Two Intermittent Rivers

Lecture notes in civil engineering, Год журнала: 2025, Номер unknown, С. 29 - 36

Опубликована: Янв. 1, 2025

Язык: Английский

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Characterising flow regimes in a semi-arid region with limited data availability: The Nil Wadi case study (Algeria)

Journal of Hydrology Regional Studies, Год журнала: 2022, Номер 41, С. 101062 - 101062

Опубликована: Март 28, 2022

Mediterranean catchment in Algeria A procedure to characterise the flow regimes of non-perennial rivers regions with limited data availability was defined. The specific aims were adapt Soil and Water Assessment Tool (SWAT) for simulating time series daily streamflow a basin temporary river network regime number reaches. An inexpensive monitoring program implemented collect basic dataset calibrate hydrological model. Regional databases, surveys, images from Google Earth used integrate available set up Flow characterised by using metrics describing aquatic phases (AS) (flow, pool, dry permanence). This study provides contribution unsolved question management under climate. Nil Wadi is perennial regimes. analysed reaches classified as "intermittent-pool" "intermittent-dry", they showed "alternate-fluent" (AF) phase upstream middle course, gradient AF "fluent-stagnant" downstream. AS "oligorheic" (low or pools connected) "arheic" (pools disconnected) mainly occurred May October. "Dry" condition that includes ASs "hyporheic" "edaphic" summer.

Язык: Английский

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Assessing effect of best management practices in unmonitored watersheds using the coupled SWAT-BiLSTM approach

Scientific Reports, Год журнала: 2023, Номер 13(1)

Опубликована: Окт. 11, 2023

Abstract In order to enhance the simulation of BMPs (Best Management Practices) reduction effects in unmonitored watersheds, this study, we combined physically-based hydrological model Soil & Water Assessment Tool (SWAT) and data-driven Bi-directional Long Short-Term Memory (Bi-LSTM), using very-high-resolution (VHR) Land Use Cover (LULC) dataset SinoLC-1 as data input, evaluate feasibility constructing a water environment for Ba-River Basin (BRB) central China improving streamflow prediction performance. SWAT-BiLSTM model, calibrated top five SWAT parameters sorted by P-Value, allowing act transfer function convert meteorological into base flow storm flow, serving input Bi-LSTM model. This optimization improved Bi-LSTM's learning process relationship between target explanatory variables. The daily results showed that hybrid had 9 regions rated "Very good," 2 "Good," "Satisfactory," 1 "Unsatisfactory" among 14 regions. achieved an NSE 0.86, R 0.85, PBIAS −2.71% overall performance during verification period BRB. indicates has high predictive accuracy no significant systematic bias, providing sound hydrodynamic quality simulation. different scenarios with only one BMP measure, stubble mulch best effect, average reductions 17.83% TN 36.17% TP. combination multiple measures, mulch, soil testing formula fertilization, vegetative filter strip performed best, achieving 42.71% 50.40% provides novel approach simulate BMPs' without measured potential wide application BMP-related decision-making.

Язык: Английский

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Impacts of land use and climate change on runoff in the Shaying River Basin based on SWAT model

Limnology, Год журнала: 2024, Номер 25(2), С. 155 - 170

Опубликована: Янв. 22, 2024

Язык: Английский

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