Issue |
E3S Web Conf.
Volume 331, 2021
International Conference on Disaster Mitigation and Management (ICDMM 2021)
|
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Article Number | 08002 | |
Number of page(s) | 7 | |
Section | Water and Resources Engineering | |
DOI | https://doi.org/10.1051/e3sconf/202133108002 | |
Published online | 13 December 2021 |
The effect of land uses to change on infiltration capacity and surface runoff at latung sub watershed, Padang City Indonesia
1 Doctoral Program in Agricultural Science, Andalas University, Indonesia
2 Department of Soil Science, Andalas University, Indonesia
3 Department of Economics, Andalas University, Indonesia
4 Department of Forestry, Muhammadiyah University of Sumatera Barat, Indonesia
* Corresponding Author: aprisal@agr.unand.ac.id
Changes in land use in the Air Dingin watershed (DAS) area in Padang City, Indonesia, lead to a decrease in rainwater infiltration volume to the ground. Some land use in the Latung sub-watershed decrease in infiltration capacity with an increase in surface runoff. This research aims to determine the effect of land-use changes on infiltration capacity and surface runoff. Purposive sampling method was used in this research. The infiltration capacity was measured directly in the field using a double-ring infiltrometer, and the data was processed using the Horton model. The obtained capacity was quantitatively classified using infiltration zoning. Meanwhile, the Hydrologic Engineering Center - Hydrology Modeling System with the Synthetic Unit Hydrograph- Soil Conservation Service -Curve Number method was used to analyze the runoff discharge. The results showed that from the 13 measurement points carried out, the infiltration capacity ranges from 0.082 - 0.70 cm/minute or an average of 0.398 cm/minute, while the rainwater volume is approximately 150,000 m3/hour/km2. Therefore, the soil infiltration capacity in the Latung sub-watershed is in zone VI-B or very low. This condition had an impact on changes in runoff discharge in this area, from 87.84 m3/second in 2010 to 112.8 m3/second in 2020 or a nail of 22.13%. Based on the results, it is concluded that changes in the land led to low soil infiltration capacity, thereby leading to an increase in surface runoff.
Key words: Land use / infiltration / runoff / Watershed
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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