Impact of land-use changes on soil hydraulic properties of Calcaric Regosols on the Loess Plateau, NW China

2015 ◽  
Vol 178 (3) ◽  
pp. 486-498 ◽  
Author(s):  
Miaozi Yu ◽  
Lulu Zhang ◽  
Xuexuan Xu ◽  
Karl-Heinz Feger ◽  
Yanhui Wang ◽  
...  
Keyword(s):  
Land Use ◽  
Loess Plateau ◽  
Hydraulic Properties ◽  
Land Use Changes ◽  
Soil Hydraulic Properties ◽  
The Loess Plateau ◽  
Nw China ◽  
Soil Hydraulic

Land-use induced spatial heterogeneity of soil hydraulic properties on the Loess Plateau in China

CATENA ◽  
2003 ◽  
Vol 54 (1-2) ◽  
pp. 59-75 ◽  
Author(s):  
Jannes Stolte ◽  
Bas van Venrooij ◽  
Guanghui Zhang ◽  
Kim O. Trouwborst ◽  
Guobin Liu ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Heterogeneity ◽  
Loess Plateau ◽  
Hydraulic Properties ◽  
Soil Hydraulic Properties ◽  
The Loess Plateau ◽  
Soil Hydraulic

scholarly journals The effects of different land uses on soil hydraulic properties in the Loess Plateau, Northern China

2018 ◽  
Vol 29 (11) ◽  
pp. 3907-3916 ◽  
Author(s):  
Shahmir Ali Kalhoro ◽  
Xuexuan Xu ◽  
Kang Ding ◽  
Wenyuan Chen ◽  
Abdul Ghaffar Shar ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Hydraulic Properties ◽  
Northern China ◽  
Land Uses ◽  
Soil Hydraulic Properties ◽  
The Loess Plateau ◽  
Soil Hydraulic

scholarly journals Earthworm Burrowing Activity and Its Effects on Soil Hydraulic Properties under Different Soil Moisture Conditions from the Loess Plateau, China

2020 ◽  
Vol 12 (21) ◽  
pp. 9303
Author(s):  
Shuhai Wen ◽  
Ming’an Shao ◽  
Jiao Wang
Keyword(s):  
Soil Moisture ◽  
Loess Plateau ◽  
Hydraulic Properties ◽  
Soil Depth ◽  
Soil Aggregates ◽  
Field Capacity ◽  
Soil Hydraulic Properties ◽  
The Loess Plateau ◽  
Burrowing Activity ◽  
Soil Hydraulic

Earthworm activity has become more important in the Loess Plateau, where hydrological processes are crucial for ecosystem sustainability. In this study, we conducted a laboratory microcosm experiment to determine the various burrowing activities of Eisenia fetida and their impact on the soil hydraulic properties in response to different levels of soil moisture (50%, 70%, 90% of field capacity) in two common soil types (loessial and Lou soil) obtained from the Loess Plateau. Burrowing activity of E. fetida increased with higher soil moisture and was greater in loessial than in Lou soil. Most burrowing activities occurred within the top 5 cm and decreased with increasing soil depth. Macropores and burrow branching, which are highly related to the earthworm burrowing, were more prevalent in wetter soil. Earthworms significantly altered the formation of large soil aggregates (AGL, diameter >2 mm) under different soil moistures and depths. Distinct earthworm burrowing activities, controlled by soil moisture, altered soil hydraulic properties. However, soil saturated hydraulic conductivity (Ks) showed little differences between different treatments due to the horizontal and high–branched burrows of E. fetida, although higher burrowing activities were found in wetter soil. Soil field capacity was highest in drier soil due to the less macropores and burrowing activities.

Development of pedotransfer functions for soil hydraulic properties in the critical zone on the Loess Plateau, China

2018 ◽  
Vol 32 (18) ◽  
pp. 2915-2921 ◽  
Author(s):  
Jiangbo Qiao ◽  
Yuanjun Zhu ◽  
Xiaoxu Jia ◽  
Laiming Huang ◽  
Ming'an Shao
Keyword(s):  
Loess Plateau ◽  
Hydraulic Properties ◽  
Critical Zone ◽  
Pedotransfer Functions ◽  
Soil Hydraulic Properties ◽  
The Loess Plateau ◽  
Soil Hydraulic

Effects of biological crust coverage on soil hydraulic properties for the Loess Plateau of China

2017 ◽  
Vol 31 (19) ◽  
pp. 3396-3406 ◽  
Author(s):  
Hao Wang ◽  
Guanghui Zhang ◽  
Fa Liu ◽  
Ren Geng ◽  
Lunjiang Wang
Keyword(s):  
Loess Plateau ◽  
Hydraulic Properties ◽  
Soil Hydraulic Properties ◽  
The Loess Plateau ◽  
Biological Crust ◽  
Soil Hydraulic

scholarly journals Effects of Vegetation Restoration on Soil Erosion on the Loess Plateau: A Case Study in the Ansai Watershed

2021 ◽  
Vol 18 (12) ◽  
pp. 6266
Author(s):  
Hui Wei ◽  
Wenwu Zhao ◽  
Han Wang
Keyword(s):  
Land Use ◽  
Soil Erosion ◽  
Loess Plateau ◽  
Water Conservation ◽  
Large Scale ◽  
Land Use Changes ◽  
Vegetation Restoration ◽  
The Loess Plateau ◽  
Local Soil ◽  
Erosion Environment

Large-scale vegetation restoration greatly changed the soil erosion environment in the Loess Plateau since the implementation of the “Grain for Green Project” (GGP) in 1999. Evaluating the effects of vegetation restoration on soil erosion is significant to local soil and water conservation and vegetation construction. Taking the Ansai Watershed as the case area, this study calculated the soil erosion modulus from 2000 to 2015 under the initial and current scenarios of vegetation restoration, using the Chinese Soil Loess Equation (CSLE), based on rainfall and soil data, remote sensing images and socio-economic data. The effect of vegetation restoration on soil erosion was evaluated by comparing the average annual soil erosion modulus under two scenarios among 16 years. The results showed: (1) vegetation restoration significantly changed the local land use, characterized by the conversion of farmland to grassland, arboreal land, and shrub land. From 2000 to 2015, the area of arboreal land, shrub land, and grassland increased from 19.46 km2, 19.43 km2, and 719.49 km2 to 99.26 km2, 75.97 km2, and 1084.24 km2; while the farmland area decreased from 547.90 km2 to 34.35 km2; (2) the average annual soil erosion modulus from 2000 to 2015 under the initial and current scenarios of vegetation restoration was 114.44 t/(hm²·a) and 78.42 t/(hm²·a), respectively, with an average annual reduction of 4.81 × 106 t of soil erosion amount thanks to the vegetation restoration; (3) the dominant soil erosion intensity changed from “severe and light erosion” to “moderate and light erosion”, vegetation restoration greatly improved the soil erosion environment in the study area; (4) areas with increased erosion and decreased erosion were alternately distributed, accounting for 48% and 52% of the total land area, and mainly distributed in the northwest and southeast of the watershed, respectively. Irrational land use changes in local areas (such as the conversion of farmland and grassland into construction land, etc.) and the ineffective implementation of vegetation restoration are the main reasons leading to the existence of areas with increased erosion.

scholarly journals Use of field and laboratory methods for estimating unsaturated hydraulic properties under different land uses

2015 ◽  
Vol 19 (3) ◽  
pp. 1193-1207 ◽  
Author(s):  
S. Siltecho ◽  
C. Hammecker ◽  
V. Sriboonlue ◽  
C. Clermont-Dauphin ◽  
V. Trelo-ges ◽  
...  
Keyword(s):  
Land Use ◽  
Unsaturated Soil ◽  
Hydraulic Properties ◽  
Rubber Tree ◽  
Measurement Methods ◽  
Soil Parameters ◽  
Forest Site ◽  
Land Uses ◽  
Soil Hydraulic Properties ◽  
Soil Hydraulic

Abstract. Adequate water management is required to improve the efficiency and sustainability of agricultural systems when water is scarce or over-abundant, especially in the case of land use changes. In order to quantify, to predict and eventually to control water and solute transport into soil, soil hydraulic properties need to be determined precisely. As their determination is often tedious, expensive and time-consuming, many alternative field and laboratory techniques are now available. The aim of this study was to determine unsaturated soil hydraulic properties under different land uses and to compare the results obtained with different measurement methods (Beerkan, disc infiltrometer, evaporation, pedotransfer function). The study has been realized on a tropical sandy soil in a mini-watershed in northeastern Thailand. The experimental plots were positioned in a rubber tree plantation in different positions along a slope, in ruzi grass pasture and in an original forest site. Non-parametric statistics demonstrated that van Genuchten unsaturated soil parameters (Ks, α and n) were significantly different according to the measurement methods employed, whereas the land use was not a significant discriminating factor when all methods were considered together. However, within each method, parameters n and α were statistically different according to the sites. These parameters were used with Hydrus1D for a 1-year simulation and computed pressure head did not show noticeable differences for the various sets of parameters, highlighting the fact that for modeling, any of these measurement methods could be employed. The choice of the measurement method would therefore be motivated by the simplicity, robustness and its low cost.

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