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- W1988446872 abstract "Soil surface bulk density (ρb) and saturated hydraulic conductivity (Ks) control many land-surface processes such as water flow, chemical transport and soil erosion. The objective of this study was to examine seasonal changes in surface ρb and Ks in natural landscapes with few human activities. Measurements of ρb and Ks were made on undisturbed soil samples taken from the soil surface (0–0.05 m) five times from October 2007 to March 2009 along four natural transects in a small watershed on the Chinese Loess Plateau. The transects represented four landscapes with different vegetation and soil typical in this region. Results showed that ρb and Ks varied seasonally. Temporal changes in Ks generally followed the temporal patterns of ρb. According to the mean values of all landscapes, bulk density decreased by 1.6 and 1.1% and log10-transformed Ks (Log10Ks) increased by 11.0 and 5.8% from October 2007 to March 2008 and from October 2008 to March 2009, respectively; bulk density increased by 2.1% and Log10Ks decreased by 4.9% from March to June in 2007; from June to October in 2007, bulk density decreased by 1.3% while a slight increase (1.4%) in Log10Ks was observed. Both landscape and time significantly influenced ρb and Ks, and Ks was more susceptible to temporal change than ρb. Spatial patterns of ρb and Ks did not change significantly with time. Saturated hydraulic conductivity measurements taken in different seasons can affect runoff simulation results, and Ks data measured in spring may result in underestimation of runoff in a rainy season." @default.
- W1988446872 created "2016-06-24" @default.
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- W1988446872 date "2012-08-21" @default.
- W1988446872 modified "2023-10-11" @default.
- W1988446872 title "Seasonal changes in surface bulk density and saturated hydraulic conductivity of natural landscapes" @default.
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- W1988446872 doi "https://doi.org/10.1111/j.1365-2389.2012.01479.x" @default.
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