The Impacts of Land-Use Input Conditions on Flow and Sediment Discharge in the Dakbla Watershed, Central Highlands of Vietnam
1
Graduate School of Environmental and Life Science, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
2
Nong Lam University, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
*
Author to whom correspondence should be addressed.
Academic Editors: Achim A. Beylich and Manoj K. Jha
Water 2021, 13(5), 627; https://doi.org/10.3390/w13050627
Received: 29 January 2021
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Revised: 17 February 2021
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Accepted: 24 February 2021
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Published: 27 February 2021
(This article belongs to the Section Hydrology)
The main objective of this study was to evaluate various land-use input conditions in terms of the performance improvement found in consequent flow and sediment simulations. The soil and water assessment tool (SWAT) was applied to the Dakbla watershed from 2000 to 2018. After the calibration and validation processes, dissimilar effects between the input conditions on the flow and sediment simulations were confirmed. It was recognized that the impact of the land use on the sediment simulation was more sensitive than with the flow simulation. Additionally, through monthly evaluation, the effects against the flow and sediment in the rainy season were larger than those in the dry season, especially for sediment simulation in the last three months from October to December. Changing land-use conditions could improve flow and sediment simulation performance better than the performance found with static land-use conditions. Updated land-use inputs should be considered in simulations if the given land-use condition changes in a relatively short period because of frequent land-use policy changes by a local government.
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Keywords:
land-use conversion; afforestation; deforestation; agricultural expansion; urbanization; mountainous areas; watershed modeling
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MDPI and ACS Style
Tram, V.N.Q.; Somura, H.; Moroizumi, T. The Impacts of Land-Use Input Conditions on Flow and Sediment Discharge in the Dakbla Watershed, Central Highlands of Vietnam. Water 2021, 13, 627. https://doi.org/10.3390/w13050627
AMA Style
Tram VNQ, Somura H, Moroizumi T. The Impacts of Land-Use Input Conditions on Flow and Sediment Discharge in the Dakbla Watershed, Central Highlands of Vietnam. Water. 2021; 13(5):627. https://doi.org/10.3390/w13050627
Chicago/Turabian StyleTram, Vo N.Q., Hiroaki Somura, and Toshitsugu Moroizumi. 2021. "The Impacts of Land-Use Input Conditions on Flow and Sediment Discharge in the Dakbla Watershed, Central Highlands of Vietnam" Water 13, no. 5: 627. https://doi.org/10.3390/w13050627
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