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为较准确地评估洛川县的土壤侵蚀状况,通过结合GIS、RS、USLE、CSLE土壤侵蚀模型定量地分析了洛川县的土壤侵蚀状况。研究结果表明:(1)两种方法的计算结果差别较大,USLE计算得到的侵蚀总量是CSLE计算得到侵蚀总量的2倍多。USLE平均土壤侵蚀模数为7 429.85 t/(km2·a),属于强度侵蚀;而CSLE平均土壤侵蚀模数为3 412.67 t/(km2·a),属于中度侵蚀。USLE计算得到的侵蚀图强度总体上偏大,极强度侵蚀所占的比例较大,而微度侵蚀和中度侵蚀较CSLE得到得侵蚀面积较少;(2)基于CSLE技术和USLE模型得出了宁强县土壤侵蚀模数,为该地区水土保持与土壤侵蚀防治提供科学依据。通过研究,现利用遥感和GIS技术的土壤侵蚀遥感监测室定量和快速的,表示的图斑详细,为土壤的动态监测提供了科学、实用和便捷的技术方法。
In order to evaluate the soil erosion in Luochuan County more accurately, the soil erosion in Luochuan County was quantitatively analyzed by combining the soil erosion models of GIS, RS, USLE and CSLE. The results show that: (1) The calculated results of the two methods are quite different. The total erosion amount calculated by the USLE is more than twice as large as the total erosion amount calculated by the CSLE. The average soil erosion modulus of USLE is 7 429.85 t / (km2 · a), which belongs to intensive erosion. The mean soil erosion modulus of CSLE is 3212.67 t / (km2 · a), which belongs to moderate erosion. The erosion intensity calculated by USLE is generally too large, the proportion of very intensive erosion is larger, while the erosion area of micro-erosion and moderate erosion is less than that of CSLE. (2) Based on the CSLE technique and the USLE model Out of Ningqiang County, the modulus of soil erosion, soil erosion and soil erosion control in the region to provide a scientific basis. Through the research, the quantitative and fast remote sensing monitoring plots of soil erosion using remote sensing and GIS technology are detailed, which provides a scientific, practical and convenient technical method for the dynamic monitoring of soil.