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Spatial Distributions of Soil Surface-Layer Saturated Hydraulic Conductivity and Controlling Factors on Dam Farmlands

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  • Peipei Zhao
  • Mingan Shao
  • Tiejun Wang

Abstract

Saturated hydraulic conductivity (Ks) is a critical soil property affecting water flow and solute transport. In the Loess Plateau of China, sloping farmlands have been increasingly replaced by dam farmlands to achieve higher crop yields and more importantly to control soil erosions. It is necessary to understand the spatial pattern of near-surface K S on those newly formed dam farmlands, because the land surface processes (e.g., erosion that is controlled by overland flow) are largely determined by the spatial distribution of near-surface Ks. In this study, near-surface Ks (e.g., 5 cm depth of the surface layers) was measured using 336 undisturbed soil samples collected from two dam farmlands located in the Liudaogou catchment, a heavily studied catchment in the Loess Plateau of China. Based on classical and geostatistical analyses, the soil properties at the filled dam farmland showed more spatial variations compared to the silting dam farmland. Statistical scale-invariance was evaluated using the Hurst scaling parameter (H) for different soil parameters. The H values ranged from 0.646 to 0.877, indicating certain degrees of statistical scale-invariance and long-range dependency within the spatial range. The bulk density (D b ), saturated water content (SW), sand content (SA), silt content (SI), and clay content (CL) were shown to affect the K S values significantly with SW, SI, and CL negatively and SA and D b positively correlated with K S . The highest K S value was found at the middle portion of the dam farmlands and the lowest value was found at the locations with the minimum occurrence of surface runoff. In addition, the areas with lowest K S values corresponded to the areas with the highest CL, SI, and SW. The results showed that disturbing soil structure by planting crops would benefit the floodwater control on dam farmlands due to increased Ks and the flooding on dam farmlands would be eased due to the silting process. Copyright Springer Science+Business Media B.V. 2010

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  • Peipei Zhao & Mingan Shao & Tiejun Wang, 2010. "Spatial Distributions of Soil Surface-Layer Saturated Hydraulic Conductivity and Controlling Factors on Dam Farmlands," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(10), pages 2247-2266, August.
    • Handle: RePEc:spr:waterr:v:24:y:2010:i:10:p:2247-2266
    DOI: 10.1007/s11269-009-9550-y
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    References listed on IDEAS

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    1. S. Rai & D. Ramana & R. Singh, 1998. "On the Prediction of Ground-Water Mound Formation in Response to Transient Recharge from a Circular Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 12(4), pages 271-284, August.
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    3. Ashok Mishra & S. Kar & V. Singh, 2007. "Prioritizing Structural Management by Quantifying the Effect of Land Use and Land Cover on Watershed Runoff and Sediment Yield," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 21(11), pages 1899-1913, November.
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    1. Renato Morbidelli & Corrado Corradini & Carla Saltalippi & Luca Brocca, 2012. "Initial Soil Water Content as Input to Field-Scale Infiltration and Surface Runoff Models," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(7), pages 1793-1807, May.
    2. Qu Simin & Wang Tao & Bao Weimin & Shi Peng & Jiang Peng & Zhou Minmin & Yu Zhongbo, 2013. "Evaluating Infiltration Mechanisms Using Breakthrough Curve and Mean Residence Time," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 27(13), pages 4579-4590, October.
    3. Peipei Zhao & Ming-an Shao & Ahmed Melegy, 2010. "Soil Water Distribution and Movement in Layered Soils of a Dam Farmland," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 24(14), pages 3871-3883, November.
    4. Cheng Cheng & Jinxi Song & Xunhong Chen & Deming Wang, 2011. "Statistical Distribution of Streambed Vertical Hydraulic Conductivity along the Platte River, Nebraska," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 25(1), pages 265-285, January.

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