International Journal of
eISSN: 2576-4454
Submit manuscript...
Research Article Volume 2 Issue 2
Investigation of impact of land use changes in watershed on surface runoff
Shixia Zhang, Yakun Guo, Zhanghua Lou
Received: January 01, 1971 | Published: March 28, 2018
Citation: Zhang S, Guo Y, Lou Z. Investigation of impact of land use changes in watershed on surface runoff. Int J Hydro. 2018;2(2):186-188. DOI: 10.15406/ijh.2018.02.00066
Abstract
Rapid urbanization can greatly affect the watershed land cover/land use and surface runoff. It is important to appropriately utilize the hydrologic model to estimate surface runoff to plan the water conservation measures and reduce the flooding disasters induced by urbanization. For urbanized cities having few field observed or/and experimental runoff data, the Soil Conservation Service Curve Number (SCS-CN) model integrating with GIS offers the best option to evaluate the surface runoff, runoff depth and coefficient in the watershed affected by urbanization. This study shows that rapid urbanization has significant effect on watershed land use and its surface runoff. Simulations demonstrate that monthly peak runoff depths during rapid urbanization period are higher than pre-rapid urbanization period. The runoff changes due to land use or rainfall change are investigated using SCS-CN Model. The results demonstrate that for the same rainfall events over the same catchment with and without urbanization, the urbanized one has much larger annual runoff depth and volume than the one without urbanization. It is revealed that the watershed land use is one of the important factors affecting surface runoff. This study is expected to advance our understanding of the urban flood measures and watershed environment protection.
Keywords: Land, Surface, Runoff, Urbanization, SCS-CN, Model, Precipitation, Investigation, Impact, Changes, Watershed, Cumulative, Infiltration, Potential, Maximum, Soil, Moisture, Retention
©2018 Zhang, et al. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially.