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| Comparison of saturated hydraulic conductivity of different land use types in Taian brown loam |
| ZHANG Peng1, HU Xinyu1, CHEN Guanyun1, ZENG Jian1, YIN Kai2, QIAN Jianjun3, ZHANG Qian1* |
| 1. College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian, Shandong 271018, China; 2. Water Conservancy Management Service Center of Xiaoqing River Basin of Haihe Huaihe River in Shandong Province, Ji′nan, Shandong 250000, China; 3. Wuhan Lanrui Space Information Technology Co. Ltd., Wuhan, Hubei 430061, China |
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Abstract In order to analyze the influence of land use types on soil saturated hydraulic conductivity, the saturated hydraulic conductivity of Taian brown loam in grassland, wheat field and bare land of fruit trees was studied by single-ring infiltration and generalized solution method. The results show that the saturated hydraulic conductivity, infiltration rate and cumulative infiltration, which are measured separately in bare land of fruit trees, grassland and wheat field, decreased in turn. With the increase of time, the cumulative infiltration amount increases continuously. Within 120 min of test time, the cumulative infiltration amount of grassland is the largest, with a value of 78.564 cm.Wheat field infiltration comes second, with a value of 67.609 cm. The bare land infiltration between the fruit trees is the minimum, with a value of 30.082 cm. Using the measured cumulative infiltration and observation time of three land use types of the fitting relation expression of cumulative infiltration rate to estimate the cumulative infiltration, grass and wheat field, bare land of fruit trees cumulative infiltration calculated values and measured values relative errors in 6, 8, 7 minutes fluctuate within 5%, and in 15, 52, 56 minutes fluctuate within 1%, at the same time, the derived soil saturated hydraulic conductivity, Ks of the grassland, wheat field and bare land of fruit trees under the three different land use types is 0.073 1, 0.032 9, 0.015 8, respectively, so as to provide reference for the study on the influence of different land use types on the saturated hydraulic conductivity of undisturbed soil.
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Received: 03 August 2019
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