Seasonal meteorological forcing controls runoff generation at multiple scales in a Mediterranean forested mountain catchment

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 639, P. 131642 - 131642

Published: July 1, 2024

Language: Английский

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Development of Appropriate Synthetic Design Storms for Small Catchments in Gauteng, South Africa

Journal of Water Management Modeling, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Synthetic design storms are often used as input in dynamic rainfall-runoff simulation models. A number of methods to generate synthetic described the literature. However, selection an inappropriate storm will unrealistic simulations. Therefore, aim this study was develop appropriate for small urban catchments Gauteng, South Africa. This evaluated applicability SCS method adapted Africa (SCS-SA), Chicago Design Storm and Rectangular Hyetograph method. The performance each compared observed rainstorm events. shape intensity were evaluation. As expected, least representative naturally occurring SCS-SA distribution curves initially performed poorly. Adjustment timing peak start event resulted a significant improvement both methods. novel approach intermediate site-specific rainfall anywhere area.

Language: Английский

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On the Definition of Extreme Evaporation Events

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(4)

Published: Feb. 14, 2025

Abstract Even though evaporation is a crucial component of the energy and water cycles, its extremes remain largely unexplored. To address this gap, study introduces statistical framework defining Extreme Evaporation Events (ExEvEs). We investigate their characteristics over Czechia, country in Central Europe with increasing examine seasonal correlation radiation and/or precipitation—the main drivers land evaporation. Despite definition, ExEvEs are shown to have physical basis, also evident onset termination. observe that fluctuate differently than average resulting significant implications for availability regional cycle's acceleration. The proposed event‐based provides systematic way detect, characterize, analyze extremes, which helps improve our understanding impacts.

Language: Английский

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Toward a better understanding of curve number and initial abstraction ratio values from a large sample of watersheds perspective

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 132941 - 132941

Published: Feb. 1, 2025

Language: Английский

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A recipe for why and how to set up and sustain an experimental catchment

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(5)

Published: May 1, 2024

Abstract Experimental catchments are fundamental elements in hydrological sciences as they provide key data for putting forward and testing hypotheses, developing theories, constraining models, making predictions. Significant progress catchment hydrology stemmed from field measurements but increasing costs risks associated with work the availability of big based on remote sensing, machine learning, a plethora well observations deriving previous current sites, raises questions whether running an experimental still provides individual community benefits past. In this commentary, I highlight advantages keeping alive propose personal 10‐step “recipe” to set up new manage sustain it long term. These suggestions can be useful both young less researchers who open facing challenge measuring processes willing offer scientific evidence advancing our knowledge hydrology.

Language: Английский

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Does a convection-permitting regional climate model bring new perspectives on the projection of Mediterranean floods?

Natural hazards and earth system sciences, Journal Year: 2024, Volume and Issue: 24(4), P. 1163 - 1183

Published: April 3, 2024

Abstract. Floods are the primary natural hazard in French Mediterranean area, causing damages and fatalities every year. These floods triggered by heavy precipitation events (HPEs) characterized limited temporal spatial extents. A new generation of regional climate models at kilometer scale have been developed, allowing an explicit representation deep convection improved simulations local-scale phenomena such as HPEs. Convection-permitting (CPMs) scarcely used hydrological impact studies, future projections remain uncertain with (RCMs). In this paper, we use CNRM-AROME CPM (2.5 km) its driving CNRM-ALADIN RCM (12 hourly timescale to simulate over Gardon d'Anduze catchment located region. Climate bias-corrected CDF-t method. Two models, a lumped conceptual model (GR5H) process-based distributed (CREST), forced historical from RCM, used. The confirms ability better reproduce extreme rainfall compared RCM. This added value is propagated on flood simulation reproduction peaks. Future consistent between but differ two models. Using magnitude all projected increase. With CPM, threshold effect found: largest expected intensify, while less severe decrease. addition, different event characteristics indicate that become flashier warmer climate, shorter lag time runoff peak smaller contribution base flow, regardless model. study first step for studies driven CPMs Mediterranean.

Language: Английский

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Impact of Antecedent Soil Moisture on Interrill Erosion

Published: May 10, 2024

The impact of antecedent soil moisture content on erosion is a complicated phenomenon, which still under argument with contradictions in research results. Hence, the objective this study to investigate loss clay by conducting two-year field experiments natural rainfall runoff plots length 10 meters, width 3 and uniform slope 9%. Volumetric sensors were used log changes, readings along records quantify conditions for each event. Results show duration effective event outranks volumetric content. Field also suggests that accumulative rain falling within 48 hours (Pp48) prior an strongly correlated per Rainfall-Runoff Erosivity Index (Soil Loss / EI30), particularly when either between ~ 7 or 10~ 30 hours. Pp48 can be considered as alternative replace RUSLE 2’s cover management factor.

Language: Английский

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The Contradictory Issue of the Impact of Antecedent Soil Moisture to Interrill Erosion in Clay Soil: A Two-Year Field Study

Water, Journal Year: 2024, Volume and Issue: 16(15), P. 2076 - 2076

Published: July 23, 2024

The impact of antecedent soil moisture content on erosion has been a contradictory issue in research, as well process-based loss estimation models. objective this study was to investigate the clay through two-year runoff plot experiments under natural rainfall. Volumetric sensors were used monitor changes, and readings along with rainfall records quantify conditions. results show that interrill is conditional, only exists events low Rainfall–Runoff Erosivity Index. coefficient determination between per Index (Soil Loss/EI30) varies from 0.222 0.758, depending duration Erosivity. also suggest accumulative within 48 h (Pp48) prior an effective event strongly correlated Soil Loss/EI30, particularly when either 3~7 or 10~30 h. Hence, Pp48 can be considered replacement for simulation

Language: Английский

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Combining global precipitation data and machine learning to predict flood peaks in ungauged areas with similar climate

Advances in Water Resources, Journal Year: 2024, Volume and Issue: 192, P. 104781 - 104781

Published: Aug. 3, 2024

Increasing flood risk due to urbanization and climate change poses a significant challenge societies at global scale. Hydrologic information that is required for understanding processes developing effective warning procedures currently lacking in most parts of the world. Procedures can combine dataset from satellite reanalysis with fast low computational cost prediction systems, are attractive solutions addressing predictions ungauged areas. This work develops tests framework relies on two fundamental components. First, meteorological data datasets (IMERG ERA5-Land) provide key input variables second, ML models trained data-rich contiguous US, applied climatically similar regions other Catchments Australia, Brazil, Chile, Switzerland, Great Britain were used as pseudo-ungauged testing. Results indicate acceptable performance both IMERG ERA5-Land forced relative difference peak within 30 % overall locally models. Specific which have revealed good include Mediterranean climates like US West Coast, subtropical areas Southern Atlantic Gulf, mild temperate Mid-Atlantic Basin. highlights potential combining precipitation pre-trained areas, climate.

Language: Английский

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Unraveling flood dynamics at sub-daily time scales in semi-arid to arid basins in south Morocco

Natural Hazards, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 17, 2024

Language: Английский

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