Study of the water transportation characteristics of marsh saline soil in the Yellow River Delta.
One-dimensional soil column water infiltration and capillary adsorption water tests were conducted in the laboratory to study the water transportation characteristics of marsh saline soil in the Yellow River Delta, providing a theoretical basis for the improvement, utilization and conservation of marsh saline soil. The results indicated the following: (1) For soils with different vegetation covers, the cumulative infiltration capacity increased with the depth of the soil layers. The initial infiltration rate of soils covered by Suaeda and Tamarix chinensis increased with depth of the soil layers, but that of bare soil decreased with soil depth. (2) The initial rate of capillary rise of soils with different vegetation covers showed an increasing trend from the surface toward the deeper layers, but this pattern with respect to soil depth was relatively weak. (3) The initial rates of capillary rise were lower than the initial infiltration rates, but infiltration rate decreased more rapidly than capillary water adsorption rate. (4) The two-parameter Kostiakov model can very well-simulate the changes in the infiltration and capillary rise rates of wetland saline soil. The model simulated the capillary rise rate better than it simulated the infiltration rate. (5) There were strong linear relationships between accumulative infiltration capacity, wetting front, accumulative capillary adsorbed water volume and capillary height.
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
Fuhong
F
He
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China. Electronic address: panxingxing@126.com.
Yinghua
Y
Pan
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
Lili
L
Tan
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China. Electronic address: zhangzh@163.com.
Zhenhua
Z
Zhang
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
Peng
P
Li
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
Jia
J
Liu
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
Shuxin
S
Ji
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
Zhaohua
Z
Qin
Institute of Agro-biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China. Electronic address: shaohongbochu@126.com.
Hongbo
H
Shao
School of Resources and Environmental Engineering, Ludong University, Yantai 264025, China.
Xueyan
X
Song
Accumulative capillary adsorbed water volume; Accumulative infiltration capacity; Capillary rise rate; Infiltration rate; Marsh saline soil