Abstract
This paper first studies the vertical structure and soil physical properties of Songlin Plot and Huangshan Plot in Chongling Small Watershed. Then, based on a series of field experiments, this paper obtains the basic parameters and infiltration characteristics of soil water movement in two runoff Plots with different land use types. After that, this paper analyzes the seasonal variation, vertical spatial change and the response to precipitation of land with different use types based on the data monitored in the runoff Plots under natural rainfall conditions. The result shows that the changes of soil water at different depths of Songlin Plot and Huangshan Plot are basically the same and that the soil water supply is completely controlled by precipitation. The water storage capacity of Songlin Plot is stronger, while the soil moisture variation of Huangpo Plot is higher, which indicates that Songlin Plot is more stable in terms of soil moisture content and stronger in self-adjustment.
Highlights
The distribution and storage of forest soil moisture in the basin and its transmission and movement in the soil are important links affecting the flow and distribution mechanism of forest watershed
The impact of forest vegetation on the hydrological process is the relationship between water storage capacity and storm water containment in the forest-soil system, so the regulation of forest vegetation on the hydrological process is realized through the interception of rainfall by the forest and the soil. [1]
In order to study the change rule of soil water in the land of different use types, this paper first explores the characteristics of vertical structure and soil of the typical artificial slope runoff plot, and analyzes the soil moisture dynamics under the natural rainfall condition
Summary
The distribution and storage of forest soil moisture in the basin and its transmission and movement in the soil are important links affecting the flow and distribution mechanism of forest watershed. The study on the distribution and movement law of forest soil moisture has been a major concern of hydrologists. In order to study the change rule of soil water in the land of different use types, this paper first explores the characteristics of vertical structure and soil of the typical artificial slope runoff plot, and analyzes the soil moisture dynamics under the natural rainfall condition. In terms of the outcrop in the study area, the limestone and marble are mostly in the northwest, the purplish red conglomerate is in the southeast, the granitic gneiss is in the middle, and the Quaternary sediment is in the valley (the main components are sand, clay, loess and gravel). The study area has the typical natural conditions in the Taihang Mountains
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