A Daily Hydrological Model Based on the New Distribution Function for Soil Water Storage Capacity leading to SCS Curve Number Method
Abstract
Hydrological models play a major role in many applications. A conceptual hydrologic model is presented based on the newly proposed distribution function for describing the soil water storage capacity. The model has a similar model structure with HyMOD based on the concept of saturation excess runoff generation. The differences between the new model and HyMOD include 1) the distribution function for soil water storage capacity is different and the new distribution function leads to the SCS curve number method; and 2) the computation of evaporation is also based on the distribution function considering the spatial variability of available water evaporation. The developed model was applied to 92 catchments in the United States for simulating daily streamflow. The performance of the model is quantified by Nash-Sutcliffe efficiency coefficient (NSE) and is improved compared with the HyMOD model.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.H41N2302K
- Keywords:
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- 1803 Anthropogenic effects;
- HYDROLOGYDE: 1833 Hydroclimatology;
- HYDROLOGYDE: 1834 Human impacts;
- HYDROLOGYDE: 1860 Streamflow;
- HYDROLOGY