ASSESSING THE IMPACTS OF CLIMATE CHANGE ON THE HYDROLOGY OF THE INDRAWATI RIVER BASIN, NEPAL
| Autor: | D. R. Gyawali, Shirisa Timilsina, B. Bade |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Hydrology
lcsh:Applied optics. Photonics geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Soil and Water Assessment Tool lcsh:T Hydrological modelling 0207 environmental engineering Drainage basin Climate change lcsh:TA1501-1820 02 engineering and technology Structural basin Monsoon 01 natural sciences lcsh:Technology Hydrology (agriculture) lcsh:TA1-2040 Environmental science 020701 environmental engineering Baseline (configuration management) lcsh:Engineering (General). Civil engineering (General) 0105 earth and related environmental sciences |
| Zdroj: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol IV-5-W2, Pp 1-8 (2019) |
| ISSN: | 2194-9050 2194-9042 |
| Popis: | This study details climate change assessment of the hydrological regime of Indrawati basin of Nepal. The study uses Soil and Water Assessment Tool (SWAT) model to delineate, discretize and parameterize the Indrawati basin to compute model’s input parameters. The model was then run for 1990–2014 to simulate the discharge at the outlet (Dholalghat). The coefficient of determination R2 and Nash-Sutcliffe (ENS) were used to evaluate model calibration and validation. The results found were satisfactory for the gauging station R2 = 0.951 and ENS = 0.901 for calibration and R2 = 0.937 and. ENS = 0.906 for validation. The calibrated hydrological model was run for the future climate change scenario using the RegCM4-LMDZ4 data and the relative changes with the baseline scenarios were analyzed. The comparison suggests that the historical trend of flow is decreasing at the rate of 0.55 m3/s per year. According to RegCM4-LMDZ4 simulations, the trend is going to continue but at a flatter rate. The decreasing trend is observed to be very less. The characteristic peak flow month in the historical scenario is August but the RegCM4-LMDZ4 led simulated flows suggest a shift in monthly peak to October suggesting decrease in monsoon flows and a subsequent significant increase in flows from October to January. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|