Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet Nam
Srepok watershed plays an important role in Central Highland in Viet Nam. It impacts to developing social-economic conditions. Therefore, it is necessary to research elements which impact to natural resources in this watershed. The Soil and Water Assessment Tool (SWAT) model and Geography Informatio...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2014-09-01
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| Series: | International Soil and Water Conservation Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095633915300253 |
| _version_ | 1797281447181025280 |
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| author | Nguyen Thi Ngoc Quyen Nguyen Duy Liem Nguyen Kim Loi |
| author_facet | Nguyen Thi Ngoc Quyen Nguyen Duy Liem Nguyen Kim Loi |
| author_sort | Nguyen Thi Ngoc Quyen |
| collection | DOAJ |
| description | Srepok watershed plays an important role in Central Highland in Viet Nam. It impacts to developing social-economic conditions. Therefore, it is necessary to research elements which impact to natural resources in this watershed. The Soil and Water Assessment Tool (SWAT) model and Geography Information System (GIS) were used to simulate water discharge in the Srepok watershed. The objectives of the research were to apply GIS and SWAT model for simulation water discharge and then, we assessed land use change which impacted on water discharge in the watershed. The observed stream flow data from Ban Don Stream gauge station was used to calibrate for the period from 1981 to 2000 and then validate for the period from 2001 to 2009. After using SWAT-CUP software to calibration, NSI reached 0.63 and R square value achieved 0.64 from 2004 to 2008 in calibration and NSI gained good level at 0.74 and R square got 0.75 from 2009 to 2012 in validation step at Ban Don Station. After that, land cover in 2010 was processed like land cover in 2000 and set up SWAT model again. The simulated water discharge in scenario 1 (land use 2000) was compared with scenario 2 (land use 2010), the simulation result was not significant difference between two scenarios because the change of area of land use was not much enough to affect the fluctuation of water discharge. However, the effect of land cover on water resource could be seen clearly via total water yield. The percentage of surface flow in 2000 was twice times more than in 2010; retard and base flow in 2000 was slightly more than in 2010. Therefore, decreased surface flow, increased infiltration capacity of water and enriched base flow resulted in the growth of land cover. |
| first_indexed | 2024-03-07T16:57:47Z |
| format | Article |
| id | doaj.art-1fdbb6df3082418db0733c14c357693f |
| institution | Directory Open Access Journal |
| issn | 2095-6339 |
| language | English |
| last_indexed | 2024-03-07T16:57:47Z |
| publishDate | 2014-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | International Soil and Water Conservation Research |
| spelling | doaj.art-1fdbb6df3082418db0733c14c357693f2024-03-03T03:34:33ZengKeAi Communications Co., Ltd.International Soil and Water Conservation Research2095-63392014-09-0123748610.1016/S2095-6339(15)30025-3Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet NamNguyen Thi Ngoc Quyen0Nguyen Duy Liem1Nguyen Kim Loi2MSc., Tay Nguyen University, Viet Nam. 567 Le Duan street, Buon Ma Thuot City, Dak Lak Province.B. E., Nong Lam University, Viet Nam. Linh Trung Ward, Thu Duc district, Ho Chi Minh City.Assoc. Prof., Nong Lam University, Viet Nam. Linh Trung Ward, Thu Duc district, Ho Chi Minh City.Srepok watershed plays an important role in Central Highland in Viet Nam. It impacts to developing social-economic conditions. Therefore, it is necessary to research elements which impact to natural resources in this watershed. The Soil and Water Assessment Tool (SWAT) model and Geography Information System (GIS) were used to simulate water discharge in the Srepok watershed. The objectives of the research were to apply GIS and SWAT model for simulation water discharge and then, we assessed land use change which impacted on water discharge in the watershed. The observed stream flow data from Ban Don Stream gauge station was used to calibrate for the period from 1981 to 2000 and then validate for the period from 2001 to 2009. After using SWAT-CUP software to calibration, NSI reached 0.63 and R square value achieved 0.64 from 2004 to 2008 in calibration and NSI gained good level at 0.74 and R square got 0.75 from 2009 to 2012 in validation step at Ban Don Station. After that, land cover in 2010 was processed like land cover in 2000 and set up SWAT model again. The simulated water discharge in scenario 1 (land use 2000) was compared with scenario 2 (land use 2010), the simulation result was not significant difference between two scenarios because the change of area of land use was not much enough to affect the fluctuation of water discharge. However, the effect of land cover on water resource could be seen clearly via total water yield. The percentage of surface flow in 2000 was twice times more than in 2010; retard and base flow in 2000 was slightly more than in 2010. Therefore, decreased surface flow, increased infiltration capacity of water and enriched base flow resulted in the growth of land cover.http://www.sciencedirect.com/science/article/pii/S2095633915300253Water dischargeLand use changeGISSWAT modelSimulations |
| spellingShingle | Nguyen Thi Ngoc Quyen Nguyen Duy Liem Nguyen Kim Loi Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet Nam International Soil and Water Conservation Research Water discharge Land use change GIS SWAT model Simulations |
| title | Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet Nam |
| title_full | Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet Nam |
| title_fullStr | Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet Nam |
| title_full_unstemmed | Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet Nam |
| title_short | Effect of land use change on water discharge in Srepok watershed, Central Highland, Viet Nam |
| title_sort | effect of land use change on water discharge in srepok watershed central highland viet nam |
| topic | Water discharge Land use change GIS SWAT model Simulations |
| url | http://www.sciencedirect.com/science/article/pii/S2095633915300253 |
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