| Title: | Hydrological modeling of Amaravila Watershed in Neyyar River Basin using Soil and Water Assessment Tool (SWAT) |
| Authors: | Snija, V.S., A. Sherring and S. Suryavanshi |
| Year: | 2018 |
| Journal: | Journal of Soil and Water Conservation |
| Volume (Issue): | 17(3) |
| Pages: | 259-266 |
| Article ID: | |
| DOI: | 10.5958/2455-7145.2018.00038.3 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | calibration, sensitivity, and/or uncertainty analysis |
| Secondary Application Category: | hydrologic assessment |
| Watershed Description: | 9.90 km^2 Amaravila River, a tributary of the Neyyar River located in the State of Kerala in southwest India. |
| Calibration Summary: | |
| Validation Summary: | |
| General Comments: | Note that the "Journal of Soil and Water Conservation" this study was published in is not the journal with the same name published by the U.S. Soil and Water Conservation Society (https://www.jswconline.org/). Instead, this journal (with the identical name) is published by the Soil Conservation Society of India (https://www.indianjournals.com/ijor.aspx?target=ijor:jswc&type=home). |
| Abstract: | A hydrological model was developed using Soil and Water Assessment Tool (SWAT) for runoff estimation
in Amaravila watershed of Neyyar river basin in the state of Kerala. 19 years (1991-2009) runoff data was
used for the study in which 9 year (1991-1999) data was employed to develop and calibrate the model.
However, 10 years monthly data (2000-2009) was used for the evaluation purpose. The entire watershed
area was divided into five sub-basins comprising 142 hydrological response units through SWAT.
Sensitivity analysis of SWAT model indicated most sensitive parameters influencing runoff are curve
number (CN), soil evaporation compensation factor (ESCO), available water capacity of the soil layer
(SOL_AWC) and threshold depth of water in the shallow aquifer to cause revamp (REVAPMN).
Performance evaluation indicators were coefficient of determination (R2), Pearson correlation coefficient
(r), Nash-Sutcliff efficiency (ENs) and root mean square error (RMSE). These were 0.89, 0.88, 0.72 and
0.14 respectively for calibration and 0.83, 0.88, 0.77 and 0.17, respectively for evaluation purpose. Water
balance indicated that about 58 percent of rainfall flows out of the basin as surface runoff. It was observed
that average annual groundwater flow is 2% of average annual rainfall and the annual evapotranspiration
is 38% of the average annual rainfall in the watershed. |
| Language: | English |
| Keywords: | Hydrological modeling, SWAT, Neyyar river basin, runoff, water balancing |