Rainfall-runoff Simulation of Bagmati River Basin, Nepal

Authors

  • Yam Prasad Dhital 1 Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China, 2 Institute of Eco-Chongming, Faculty of Earth Sciences, East China Normal University, Chongming, Shanghai, China
  • Binod Dawadi 1. Central Department of Hydrology and Meteorology, Tribhuvan University, Kathmandu, Nepal, 2. Kathmandu Center for Research and Education, Chinese Academy of Sciences, Tribhuvan University 44613 Kathmandu
  • Dambaru Ballab Kattel Key Laboratory of Tibetan Plateau Environment and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beiing 100101, China
  • Krishna Chandra Devkota Global Institute for Interdisciplinary Studies (GIIS), Kathmandu, Nepal

Keywords:

Hydrological modeling, runoff simulation, flood forecasting

Abstract

Runoff simulation is a complex problem in mountain catchments due to high rainfall variability and rugged topography. In the lower parts of Nepal, river flooding is a serious disaster problem in July and August; sometimes it also occurs in September. In this context, Hydro-Informatic Modeling System (HIMS) was used for daily and monthly runoff simulation from the set of daily hydro-meteorological data (Maximum and minimum temperature, rainfall, and discharge) in the time series 1980 to 1989, 1990 to 1999, and 2000 to 2009, respectively. The model performed well for the monthly runoff simulation, whereas the efficiency coefficient and relative coefficient both were found a very good correlation between observed and simulated hydrographs, which varied between 0.883 to 0.940 and 0.889 to 0.945, respectively. However, the efficiency coefficient and relative coefficient both were found a very poor correlation between observed and simulated hydrographs for the daily runoff simulation, which averaged 0.342 and 0.348, respectively. The daily simulation result also might have been improved, if more no. of uniformly distributed meteorological station data is available.

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Published

2021-04-21

How to Cite

Dhital, Y. P., Dawadi, B., Kattel, D. B., & Devkota, K. C. (2021). Rainfall-runoff Simulation of Bagmati River Basin, Nepal. JALAWAAYU, 1(1), 61-71. Retrieved from https://cdhmtu.edu.np/journal/index.php/jalawaayu/article/view/28

Issue

Vol. 1 No. 1 (2021): JALAWAAYU

Section

Articles

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Copyright (c) 2021 Yam Prasad Dhital

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