NDLI: Hillslope soil moisture temporal stability under two contrasting land use types during different time periods

Content Provider	Springer Nature Link
Author	Lv, Ligang Liao, Kaihua Lai, Xiaoming Zhu, Qing Zhou, Shenglu
Copyright Year	2016
Abstract	Knowledge of soil moisture temporal stability and its controlling factors is important for hydrological and environmental management decisions. This study analyzed the influences of soil and terrain on soil moisture temporal stability (relative difference of soil moisture—δ and standard deviation of δ − S $_{ δ }$) on two contrasting land use hillslopes [tea garden (TG) and bamboo forest (BF)] in the hilly area of Taihu Lake Basin, China. Soil moisture temporal stabilities were considered at two depths (0.1 and 0.3 m) and during eight different periods (entire, dry, wet, rain, spring, summer, fall and winter periods). Results showed that for each land use and soil depth, values of δ in summer were largely deviated from those during the entire period, while values of S $_{ δ }$ after rain storms were strongly deviated from those during the entire period. Correlation coefficients between soil/terrain and δ were generally greater on the BF hillslope (ranged from 0.35 to 0.70) than on the TG hillslope (ranged from 0.30 to 0.55). This suggested that soil moisture distribution was more spatially organized on the BF hillslope than on the TG hillslope. This can be attributed to that the management practices disturbed and mixed the soils on the TG hillslope, which made the soil moisture more randomly distributed. The controls on S $_{ δ }$ substantially varied with season, soil depth and land use. On the TG hillslope, soil/terrain had weak correlations with S $_{ δ }$, while on the BF hillslope, rock fragment, slope and elevation had decent correlation with S $_{ δ }$. This varied controlling factors of S $_{ δ }$ on different hillslopes, period and soil depth suggested that spatial distributions of S $_{ δ }$ were influenced by the occurrence of subsurface preferential flow. Findings of this study suggested that soil moisture temporal stability and its controlling factors were land use type and time period dependent.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	7
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-03-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydropedology Soil water content Temporal stability Land use Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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