Runoff Response to Soil Moisture and Micro-topographic Structure on the Plot Scale

Scientific Reports
Jiakai LiuMingxiang Zhang

Abstract

Structural hydrological connectivity has been proposed to describe the geological structure of the landscape as well as to explain hydrological behaviors. Indices based on the topological or soil condition were developed to interpret their relationships. While previous studies mainly focused on well-instrumented catchments which are narrow in humidity or temperate zone, the hydrological responses to structural connectivity at the plot and hill slope scale as well as in arid or semi-arid climate conditions remain unclear. This study was conducted in the semi-arid mountainous region of northern China in Haihe Basin which is the source of water of about 350 million people. Experiments were conducted during the rainy season in 2012 and 2013 using four runoff plots. Two indices, flow path length (FL) based on topography and integral connectivity scale length (ICSL) based on soil moisture conditions, developed to represent hydrological connectivity structure and the runoff response to rainfall were analyzed. The results showed that the surface runoff coefficient was strongly and positively linearly correlated to FL, and the correlation between subsurface flow and ICSLs was quadratic. Plots with shorter FL required more rainfall to ge...Continue Reading

References

Oct 3, 2009·Science·Erik Stokstad
Apr 9, 2013·The Science of the Total Environment·Dominic EnglertMirco Bundschuh
Aug 12, 2014·Journal of Contaminant Hydrology·Jana von FreybergMario Schirmer
Oct 22, 2015·Ecological Applications : a Publication of the Ecological Society of America·Nathan D Chelgren, Jason B Dunham
Jun 7, 2016·The Science of the Total Environment·J Rodrigo CominoJ B Ries

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Citations

Aug 9, 2019·Environmental Science and Pollution Research International·Kang XuMingxiang Zhang

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ArcGIS
MATLAB

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