Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, Sikkim
The precise identification of basin characteristics and climate factors that plays a significant role in determining water and sediment yield is of paramount importance. However, due to the enormous complexity associated with the hydrologic cycle, it is usually challenging to extricate the influence...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-08-01
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| Series: | Journal of Water and Climate Change |
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| Online Access: | http://jwcc.iwaponline.com/content/13/8/3189 |
| _version_ | 1818064112129671168 |
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| author | Pema Tshering Lepcha Pankaj Kumar Pandey Vanita Pandey |
| author_facet | Pema Tshering Lepcha Pankaj Kumar Pandey Vanita Pandey |
| author_sort | Pema Tshering Lepcha |
| collection | DOAJ |
| description | The precise identification of basin characteristics and climate factors that plays a significant role in determining water and sediment yield is of paramount importance. However, due to the enormous complexity associated with the hydrologic cycle, it is usually challenging to extricate the influence of individual parameters on the combined water and sediment yield responses. To accomplish this, a combined hydrological modelling and statistical approach was adopted in this study. The Soil and Water Assessment Tool (SWAT) model was adopted to simulate different components of the watershed and the results were utilized in Boosted Regression Trees (BRTs) to analyze the contribution of different parameters to water and sediment yield at spatio-temporal and seasonal scales in the upstream Teesta River basin. The outcomes of the analysis showed that precipitation and baseflow play a crucial role in regulating the water yield at all spatio-temporal scales. On the other hand, precipitation alone has a key role in determining the sediment yield, especially at the daily (49.30%) and monthly (21.14%) temporal scales. The relative contribution of the remaining parameters at a yearly temporal scale, and small and intermediate spatial scales showed relatively close results with an exception at the large basin scale (precipitation alone by 35.88%). The average contribution of actual evapotranspiration was found to be less on both water and sediment yield prediction in all spatio-temporal scales considered. The analysis also revealed that the precipitation, baseflow, and minimum temperature play a key role in regulating the water and sediment yield in both monsoon and non-monsoon seasons, whereas the contribution of maximum temperature and snowmelt was found less during monsoon and non-monsoon seasons. The outcomes of this study may assist policymakers and water managers in rational water management goals as well as in coping with soil degradation issues.
HIGHLIGHTS
A hydro-statistical approach to access the significance of basin and hydro-climatic factors on the water and sediment yield.;
Precipitation and baseflow are the key contributors to the water yield.;
Precipitation regulates sediment yield mechanisms at all scales.;
Negligible role of evapotranspiration in determining water and sediment yield at all scales.;
Weather and vegetation indices vary inversely to water and sediment yield at all scales.; |
| first_indexed | 2024-12-10T14:30:49Z |
| format | Article |
| id | doaj.art-d6026afb956843e0a23a912c43c2f5c4 |
| institution | Directory Open Access Journal |
| issn | 2040-2244 2408-9354 |
| language | English |
| last_indexed | 2024-12-10T14:30:49Z |
| publishDate | 2022-08-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water and Climate Change |
| spelling | doaj.art-d6026afb956843e0a23a912c43c2f5c42022-12-22T01:44:57ZengIWA PublishingJournal of Water and Climate Change2040-22442408-93542022-08-011383189321610.2166/wcc.2022.210210Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, SikkimPema Tshering Lepcha0Pankaj Kumar Pandey1Vanita Pandey2 Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Itanagar, Arunachal Pradesh, India Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Itanagar, Arunachal Pradesh, India Department of Agricultural Engineering, North Eastern Regional Institute of Science and Technology (NERIST), Nirjuli, Itanagar, Arunachal Pradesh, India The precise identification of basin characteristics and climate factors that plays a significant role in determining water and sediment yield is of paramount importance. However, due to the enormous complexity associated with the hydrologic cycle, it is usually challenging to extricate the influence of individual parameters on the combined water and sediment yield responses. To accomplish this, a combined hydrological modelling and statistical approach was adopted in this study. The Soil and Water Assessment Tool (SWAT) model was adopted to simulate different components of the watershed and the results were utilized in Boosted Regression Trees (BRTs) to analyze the contribution of different parameters to water and sediment yield at spatio-temporal and seasonal scales in the upstream Teesta River basin. The outcomes of the analysis showed that precipitation and baseflow play a crucial role in regulating the water yield at all spatio-temporal scales. On the other hand, precipitation alone has a key role in determining the sediment yield, especially at the daily (49.30%) and monthly (21.14%) temporal scales. The relative contribution of the remaining parameters at a yearly temporal scale, and small and intermediate spatial scales showed relatively close results with an exception at the large basin scale (precipitation alone by 35.88%). The average contribution of actual evapotranspiration was found to be less on both water and sediment yield prediction in all spatio-temporal scales considered. The analysis also revealed that the precipitation, baseflow, and minimum temperature play a key role in regulating the water and sediment yield in both monsoon and non-monsoon seasons, whereas the contribution of maximum temperature and snowmelt was found less during monsoon and non-monsoon seasons. The outcomes of this study may assist policymakers and water managers in rational water management goals as well as in coping with soil degradation issues. HIGHLIGHTS A hydro-statistical approach to access the significance of basin and hydro-climatic factors on the water and sediment yield.; Precipitation and baseflow are the key contributors to the water yield.; Precipitation regulates sediment yield mechanisms at all scales.; Negligible role of evapotranspiration in determining water and sediment yield at all scales.; Weather and vegetation indices vary inversely to water and sediment yield at all scales.;http://jwcc.iwaponline.com/content/13/8/3189brtsspatio-temporal scaleswatteesta river basinwater and sediment yieldwater resource management |
| spellingShingle | Pema Tshering Lepcha Pankaj Kumar Pandey Vanita Pandey Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, Sikkim Journal of Water and Climate Change brts spatio-temporal scale swat teesta river basin water and sediment yield water resource management |
| title | Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, Sikkim |
| title_full | Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, Sikkim |
| title_fullStr | Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, Sikkim |
| title_full_unstemmed | Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, Sikkim |
| title_short | Quantifying the significance of basin parameters and hydro-climatic factors to water and sediment yields across spatio-temporal scales in mountainous river Basin, Sikkim |
| title_sort | quantifying the significance of basin parameters and hydro climatic factors to water and sediment yields across spatio temporal scales in mountainous river basin sikkim |
| topic | brts spatio-temporal scale swat teesta river basin water and sediment yield water resource management |
| url | http://jwcc.iwaponline.com/content/13/8/3189 |
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