Hydrological Responses and Flow Pathways in an Acrisol on a Forested Hillslope with a Monsoonal Subtropical Climate

作     者：Lars-Erik SORBOTTEN Jannes STOLTE WANG Yanhui Jan MULDER 

作者机构：Norconsult ASN-1338 Sandvika(Norway) Norwegian Institute of Bioeconomy Research(NIBIO)N-1430 Aas(Norway) Research Institute of Forest EcologyEnvironment and ProtectionChinese Academy of ForestryBeijing 100091(China) Department of Environmental SciencesNorwegian University of Life SciencesN-1432 Aas(Norway) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2017年第27卷第6期

页      面：1037-1048页

核心收录：

学科分类：07[理学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0901[农学-作物学] 

基　　金：supported by the Norwegian Research Council(Nos.193725/S30 and 209696/E10) Chinese Academy of Science(CAS)(No.209696/E10) 

主　　题：dye tracer hillslope hydrology hydraulic conductivity preferential flow soil pores subsurface lateral flow 

摘      要：The nature of subsurface flow depends largely on hydraulic conductivity of the vadoze zone, permeability of the underlying bedrock, existence of soil layers differing in hydraulic properties and macropore content, soil depth, and slope *** of flow pathways on forested hillslopes is essential to understand hydrological dynamics and solute transport ***, with their argic Bt horizons, are challenging in this *** further elucidate flow pathways of water and short-term variability of soil moisture patterns in Acrisols, a field study was conducted on a forested hillslope in a sub-catchment of the Tie Shan Ping(TSP)watershed, 25 km northeast of Chongqing City, *** catchment is covered by a mixed secondary forest dominated by Masson pine(Pinus massoniana).Soil saturated hydraulic conductivity(K sat) was significantly reduced at the interface between the AB and Bt horizons(2.6 × 10^(-5) vs.1.2 × 10^(-6) m s^(-1)), which led to that the flow volume generated in the Bt horizon was of little quantitative importance compared to that in the AB *** was a marked decrease in porosity between the OA and AB horizons, with a further decrease deeper in the mineral ***, the content of soil pores 300 μm was higher in the AB horizon(14.3%)than in the Bt horizon(6.5%).This explained the difference in soil K sat *** study showed that Bt horizon had limited water transport capability, forcing part of the infiltrated rainwater as interflow through the OA and AB ***, the topsoil responded quickly to rainfall events, causing frequent cycles of saturation and aeration of soil pores.