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Water 2018, 10(5), 633; https://doi.org/10.3390/w10050633

Integrated Effects of Land Use and Topography on Streamflow Response to Precipitation in an Agriculture-Forest Dominated Northern Watershed

1
North China University of Water Resources and Electric Power, Zhengzhou 450045, China
2
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
3
Henan Key Laboratory of Water Environment Simulation and Treatment, Zhengzhou 450046, China
4
EcoLab, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France, Avenue de l’Agrobiopole, 31326 Castanet Tolosan Cedex, France
5
Research Faculty of Agriculture, Hokkaido University, Sapporo 0608589, Japan
*
Authors to whom correspondence should be addressed.
Received: 2 April 2018 / Revised: 2 May 2018 / Accepted: 7 May 2018 / Published: 13 May 2018
(This article belongs to the Section Hydrology)
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Abstract

Based on statistical analysis, baseflow separation and wavelet analysis, this research was carried out in Shibetsu River Watershed (SRW), Eastern Hokkaido, Japan, to investigate the integrated effects of land use and topography on streamflow response to precipitation. The agriculture-dominated sub-watershed (AW) showed coupled flat topography/agriculture characteristics, the forest-dominated sub-watershed (FW) had coupled steep topography/forest characteristics, and the mixed agriculture-forested sub-watershed (AFW) had mixed flat topography/agriculture and steep topography/forest characteristics. Precipitation variability is characterized by 6-months and 1-year periods. Coupled forest land/steep topography of the FW can increase surface runoff due to forest surface soil water repellency and steep slope, and might receive more external water and higher precipitation that resulted in the highest baseflow and total streamflow compared with other sub-watersheds. Coupled forest land/steep topography can cause higher monthly streamflow variability than coupled agricultural land/flat topography. The FW streamflow is characterized by 3–4 months, 6 months, and 1-year periods. The AW streamflow is only characterized by 3–4 months and 6 months periods. Coupled agricultural land/flat topography produced similar magnitude of baseflow during snowmelt season (March–May) and rainfall season (July–September), which resulted in the losing of annual periodicity in AW streamflow. The coupled forest land/steep topography can increase synchronicity in precipitation and streamflow at annual and monthly scales than coupled agricultural land/flat topography, except in 2007 under wet antecedent conditions when pasture land has lower rainfall interception and lower surface soil infiltration capacity. The coupled forest land/steep topography can increase time lags between precipitation and streamflow compared to coupled agricultural land/flat topography. View Full-Text
Keywords: coupled land use and topography; streamflow response to precipitation; northern volcanic watershed; streamflow characteristics; wavelet analysis coupled land use and topography; streamflow response to precipitation; northern volcanic watershed; streamflow characteristics; wavelet analysis
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Wang, C.; Shang, S.; Jia, D.; Han, Y.; Sauvage, S.; Sánchez-Pérez, J.-M.; Kuramochi, K.; Hatano, R. Integrated Effects of Land Use and Topography on Streamflow Response to Precipitation in an Agriculture-Forest Dominated Northern Watershed. Water 2018, 10, 633.

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