A Mathematical Approach for Determining the Soil Water Infiltration Curve
Soil water infiltration measurements are a fundamental tool in many areas of research and applied science, including hydrology, the prediction and control of floods, and the management of water in agricultural landscapes. In this study, a mathematical approach (MA) was advanced for the rapid determination of a soil water infiltration curve, requiring the measurement of only three data points. To achieve this, the entire infiltration process was divided into two components: a final infiltration rate (approximately corresponding to saturated hydraulic conductivity), and the transient infiltration curve (time dependent), which is determined using two data points measured at the beginning of the infiltration process. These parameters can be used in a modified Kostiakov model, which requires the input of three parameters for calculating the entire infiltration curve. Laboratory experiments, as well as 33 data comparisons in 10 published studies (11 land uses and 10 soil textures) including same land use under different soil texture, same soil texture under different land use and other lab experiment conditions were conducted to generate data sets and validate infiltration curves. The infiltration curves calculated from three infiltration rate data pairs at 2 and 5, 2 and 10, and 5 and 10 min corresponded well with the whole curves measured over 3 h periods. The infiltration rates calculated by the MA and those measured continuously also corresponded well, with proportional coefficients ranging from 0.951 to 1.052, indicating the reliability of the MA. With this new approach, measurement times for whole infiltration curves can be reduced significantly, (e.g., 10 min), thereby saving considerable amounts of time, effort, water, and financial resources for the many applications in which soil infiltration measurements are required
Year of publication: |
[2022]
|
---|---|
Authors: | Zhang, Jing ; Qu, Liqin ; Wang, Fuqiang ; Wei, Huaibin ; Yang, Xiusheng |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
Saved in favorites
Similar items by person
-
Impact of resources and technology on farm production in northwestern China
Deng, Xinan, (2005)
-
CAO, YU, (2011)
-
A life cycle analysis of Hunan's enterprises and their determinants
Chen, Xiaohong, (2010)
- More ...