Kyushu Space Discussion on the Influence of Soil Moisture on Soil Wind Erosion
As soil carrying capacity continues to increase, wind erosion has become a major problem for us, especially in the more arid regions of the North, which has increased the status quo of drought. When we study soil problems, we need to combine many influencing factors in order to get more accurate data. At this time we need to use the soil temperature and humidity meter, this kind of detection will become more convenient and reduce more errors. Under the indoor simulation conditions, after using the known wind speed on the soil, comparing the soil wind erosion under different soil moisture and vegetation cover conditions, combined with the field observation results of soil wind erosion in the source region of the Weihe River, revealing the wind erosion characteristics of the regional soil. This method has reference significance in field positioning research.
The wind speed is controlled by the distance from the centrifugal fan to the wind erosion sample. Only the wind speed, wind direction and wind erosion amount are considered, regardless of the wind movement characteristics, so that the process of many factors is avoided, and only the causal relationship is considered, the experimental result will be closer to Natural conditions. The wind erosion conditions of the soil are greater than the wind speed critical wind speed and the relative critical wind erosion wind cover. Through field investigation, the forest area can be closed to 60%, and the cover of the cultivated land is zero. The measured height of the experimental wind speed is 3.5 cm, and the measured wind speed is basically maintained in a stable state.
The amount of erosion decreased with the increase of vegetation coverage, that is, the vegetation coverage was significantly negatively correlated with soil erosion. This experimental result reflects the actual situation of the farming-pastoral ecotone in northern China, namely the grazing in winter and spring. The coverage of the ground vegetation is reduced, and the wind erosion effect is aggravated. The change of the amount of the erosion is very small, and the water content of 10% is determined as the upper limit of the experimental soil moisture, which is also in line with the actual situation of the soil sample taken. With the increase of humidity, the soil moisture is negatively correlated with the amount of erosion. The wind erosion condition of the soil is greater than the wind speed critical wind speed and the relative critical wind erosion wind cover. Through field investigation, the research area forest land depression The degree of closure is up to 60%, and the coverage of cultivated land is zero, that is, the vegetation coverage is significantly negatively correlated with the amount of soil erosion. This experimental result reflects the actual situation of the farming-pastoral ecotone in northern China, namely the winter and spring seasons. Grazing reduces the coverage of ground vegetation and exacerbates soil wind erosion.
Dust Mask,Anti Dust Mask,Protective Mask,Surgical Disposable Face Mask
ShanDong YongFang Sanitary Products Co.,Ltd , https://www.sdyongfang.com