Guta Wakbulcho Abeshu
A5058468718- Hydrology and Watershed Management Studies
- Hydrology and Drought Analysis
- Hydrology and Sediment Transport Processes
- Water resources management and optimization
- Flood Risk Assessment and Management
- Soil erosion and sediment transport
- Cryospheric studies and observations
- Plant Water Relations and Carbon Dynamics
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Medical Imaging Techniques and Applications
- Water-Energy-Food Nexus Studies
- Toxic Organic Pollutants Impact
- Soil and Water Nutrient Dynamics
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Atomic and Subatomic Physics Research
- Reservoir Engineering and Simulation Methods
- Geological Modeling and Analysis
- Land Use and Ecosystem Services
- Botany and Plant Ecology Studies
- Environmental DNA in Biodiversity Studies
- Soil Carbon and Nitrogen Dynamics
- Species Distribution and Climate Change
- Odor and Emission Control Technologies
Pacific Northwest National Laboratory
2024-2025
University of Houston
2018-2024
This work documents the first version of U.S. Department Energy (DOE) new Exascale Earth System Model (E3SMv1). We focus on standard resolution fully coupled physical model designed to address DOE mission-relevant water cycle questions. Its components include atmosphere and land (110-km grid spacing), ocean sea ice (60 km in midlatitudes 30 at equator poles), river transport (55 km) models. base configuration will also serve as a foundation for additional configurations exploring higher...
Risk management has reduced vulnerability to floods and droughts globally1,2, yet their impacts are still increasing3. An improved understanding of the causes changing is therefore needed, but been hampered by a lack empirical data4,5. On basis global dataset 45 pairs events that occurred within same area, we show risk generally reduces faces difficulties in reducing unprecedented magnitude not previously experienced. If second event was much more hazardous than first, its impact almost...
Abstract. Suspended sediment plays a vital role in the regional and global cycling of carbon nutrients by carrying from headwaters into lowland rivers oceans. Sediment transport through river systems is often fundamentally modified human activities such as reservoir management. However, physically based representation still missing most existing Earth system models (ESMs), which are essential tools for modeling predicting changes. Here, we introduce multi-process module ESMs, includes (1)...
Abstract. As the adverse impacts of hydrological extremes increase in many regions world, a better understanding drivers changes risk and is essential for effective flood drought management climate adaptation. However, there currently lack comprehensive, empirical data about processes, interactions, feedbacks complex human–water systems leading to impacts. Here we present benchmark dataset containing socio-hydrological paired events, i.e. two floods or droughts that occurred same area. The...
Abstract. This study enhances an existing global hydrological model (GHM), Xanthos, by adding a new water management module that distinguishes between the operational characteristics of irrigation, hydropower, and flood control reservoirs. We remapped reservoirs in Global Reservoir Dam (GRanD) database to 0.5∘ spatial resolution Xanthos so single lumped reservoir exists per grid cell, which yielded 3790 large implemented unique operation rules for each type, based on their primary purposes....
Abstract. Bed-material sediment particle size data, particularly the median (D50), are critical for understanding and modeling riverine transport. However, observations primarily available at individual sites. Large-scale assessment of transport limited by lack continuous regional maps bed-material size. We hence present a map D50 over contiguous US in vector format that corresponds to approximately 2.7 million river segments (i.e., flowlines) National Hydrography Dataset Plus (NHDPlus)...
Abstract. This study enhances an existing global hydrological model (GHM), Xanthos, by adding a new water management module that distinguishes between the operational characteristics of irrigation, hydropower, and flood control reservoirs. We remapped reservoirs in GranD database to Xanthos' 0.5-degree spatial resolution so single lumped reservoir exists per grid cell, which yielded 3790 large implemented unique operation rules for each type based on their primary purposes. In particular,...
Abstract This paper is motivated to understand the multi‐temporal scale characteristics of Horton Index (HI), an indicator catchment‐scale plant water use defined as ratio catchment vaporization (total evapotranspiration) wetting (precipitation minus surface runoff). Based on generalized proportionality hypothesis, we first develop analytical framework HI applicable at scales a single function ecological aridity index (EAI), potential evapotranspiration wetting. We successfully validate this...
Abstract. Reservoirs play a significant role in modifying the spatiotemporal availability of surface water to meet multi-sector human demands, despite representing relatively small fraction global budget. Yet integrated modeling frameworks that explore interactions among climate, land, energy, water, and socioeconomic systems at scale often contain limited representations storage dynamics incorporate feedbacks from other systems. In this study, we implement representation Global Change...
Abstract. Bed-material sediment particle size data, particularly for the median (D50), are critical understanding and modeling riverine transport. However, observations primarily available at individual sites. Large-scale assessment of transport limited by lack continuous regional maps bed-material size. We hence present a map D50 over contiguous U.S. in vector format that corresponds to millions river segments (i.e., flowlines) National Hydrography Dataset Plus (NHDplus) dataset. develop...
Abstract. Riverine dissolved organic carbon (DOC) plays a vital role in regional and global cycles. However, the processes of DOC conversion from soil (SOC) leaching into rivers are insufficiently understood, inconsistently represented, poorly parameterized, particularly land surface earth system models. As first attempt to fill this gap, we propose generic formula that directly connects SOC concentration with headwater streams, where single parameter, transformation rate flux, Pr, accounts...
Abstract. Suspended sediment plays a vital role in the regional and global cycling of carbon nutrients by carrying from headwaters into lowland rivers oceans. Sediment transport through river systems is often fundamentally modified human activities like reservoir management. However, physically based representation still missing most existing earth system models (ESMs), which are essential tools for modeling predicting changes. Here, we introduce multi-process module ESMs, includes: 1)...
Abstract. This study explores the causal relationships between catchment water availability, vapor pressure deficit, and gross primary productivity across 341 catchments in contiguous US. Seasonal climatic, hydrological, vegetation characteristics were represented using Horton index, ecological aridity evaporative fraction carbon uptake efficiency. Statistical methods, including circularity statistics, correlation analysis, causality tests, employed to determine complex interactions wetness,...
Abstract. As the adverse impacts of hydrological extremes increase in many regions world, a better understanding drivers changes risk and is essential for effective flood drought management climate adaptation. However, there currently lack comprehensive, empirical data about processes, interactions feedbacks complex human-water systems leading to impacts. Here we present benchmark dataset containing socio-hydrological paired events, i.e., two floods or droughts that occurred same area. The...
Abstract. Reservoirs play a significant role in modifying the spatiotemporal availability of surface water to meet multi-sector human demands, despite representing relatively small fraction global budget. Yet integrated modeling frameworks that explore interactions among climate, land, energy, water, and socioeconomic systems at scale often contain limited representations storage dynamics incorporate feedbacks from other systems. In this study, we implement representation Global Change...