Hydrological Modeling is pivotal in comprehending water system behavior and predicting reactions to different elements. We utilize advanced techniques to simulate intricate interactions among precipitation, runoff, groundwater, and surface water. Our work enhances water resource management, flood prediction, and ecosystem preservation.
Study 1:
- Research paper focuses on hydrological modeling for water resource management in Deduru Oya river basin, Sri Lanka.
- HEC-HMS model (Hydrologic Engineering Center - Hydrologic Modeling System) version 3.0.1 is utilized.
- Model simulates rainfall-runoff processes and estimates runoff in Deduru Oya river.
- Various data sources integrated: rainfall, evaporation, land use, soil, river runoff, diversions, irrigation releases, and drainage flow.
- HEC-HMS model incorporates advanced techniques: five-layer soil moisture accounting loss method, Clark unit hydrograph transformation method, and recession base flow method.
- Model successfully reproduces stream flows in Deduru Oya basin (Nash Sutcliffe efficiency of 0.80).
- HEC-HMS is valuable for water management in tropical catchments with intra-basin diversions and irrigation storages.
- Model contributes to efficient utilization of water resources in Deduru Oya river basin
Study 2:
- Physically based distributed hydrologic model developed for flood inundation simulation.
- Model combines overland and channel flow, evapotranspiration, unsaturated zone, and saturated zone models.
- Individual models validated with test data before coupling.
- Model capable of handling fine resolution spatial data, preserving spatial heterogeneity.
- River embankments considered in flood inundation simulation.
- Applied to a river catchment in Japan to simulate a flood event in 1996.
- Model outputs exhibit good agreement with observed flood hydrographs and surveyed flood inundation.
Study 3:
- Distributed hydrological model uses an alternative hillslope discretization scheme.
- Scheme based on catchment area function and width function.
- Catchment divided into flow intervals along the flow distance.
- Flow intervals consist of symmetric hillslope elements.
- Number of hillslope elements determined by number of river segments with same flow interval.
- River network is lumped, and main channel used for routing river flow.
- Spatial variations in catchment represented by one-dimensional distribution functions.
- Hillslope elements described by physically-based governing equations.
- Runoff from hillslope elements serves as lateral inflow to river.
- Kinematic wave method used for river routing.
- Paper compares grid-based and geomorphology-based hydrologic models.
- Application of alternative hillslope discretization scheme discussed in context of Chao Phraya River basin, Thailand.