基于站点观测的河南土壤侵蚀因子变化分析.

Soil and water loss due to soil erosion is an important influence to the ecological environment. Soil erosion factors are the key technical basis for scientific comprehensive management of soil and water conservation and ecological protection. The paper selected the quantitative equation of soil erosion factors based on the actual measurement data of Henan Soil and Water Conservation Observation Station to calculate the soil erosion rainfall, topography, soil, vegetation and soil and water conservation factors in Henan Province and analyzed its changing characteristics. The results show that the rainfall erosivity factor R tends to increase and the value of R factor gradually decreases from southeast to northwest. The value of soil erodibility factor K with an overall decreasing trend, indicates that erosion control is effective. The terrain factor LS value of Nanzhao Station is higher than that of Shaanzhou Station and Luoshan Station, and when the slope exceeds 20°, soil erosion will be seriously increased. The vegetation cover C factor is different among different vegetation types. The value of C factor irrigated vegetation is small, and the value of C factor without vegetation measures is large. The value of soil and water conservation measures factor P show an overall decreasing trend. Soil and water conservation measures have played a good protective effect. [ABSTRACT FROM AUTHOR]