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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Investigation method for regional soil erosion based on the Chinese Soil Loss Equation and high-resolution spatial data: Case study on the mountainous Yunnan Province, China
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Investigation method for regional soil erosion based on the Chinese Soil Loss Equation and high-resolution spatial data: Case study on the mountainous Yunnan Province, China

机译：基于中国土壤损失方程和高分辨率空间数据的区域土壤侵蚀调查方法 - 云南山区案例研究

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摘要

Investigating soil erosion at the regional scale is challenging because of the difficulties with balancing the accuracy against the cost, especially in areas where the terrain and land use are complex. In this study, we developed a feasible approach to evaluating soil erosion at the regional scale that uses the Chinese Soil Loss Equation (CSLE) and 0.5 m high-resolution Worldview Satellite images, from which soil and water conservation (SWC) engineering practices were interpreted and included into the model as the E factor. We took the mountainous Yunnan Province of southwest China as a case study, and successfully tested this method and estimated the erosion modulus and soil erosion intensity of this region. The model was validated against with measured data derived from 47 runoff plots; the results showed that the coefficient of determination of CSLE was 0.89, which indicates high accuracy. The average erosion modulus was 12.56 t.ha(-1).a(-1 )at the provincial level, and areas with a high erosion modulus were mainly distributed in the central and northeast parts. The total soil erosion area was 104,727.74 km(2), accounting for 27.33% of the total area. More than 77% of above middle erosion occurred in farmlands. Our study is the first effort at incorporating high-precision SWC engineering measures data into regional soil erosion investigation. Our approach reduces the soil erosion estimation error caused by low data accuracy, overcomes the technical bottleneck for obtaining information on regional SWC measures, and provides a practical and low-cost method for evaluating regional soil erosion.
机译：在区域规模上调查土壤侵蚀是具有挑战性的，因为抵抗成本的准确性困难，特别是在地形和土地利用复杂的地区。在这项研究中，我们开发了一种可行的方法来评估利用中国土壤损失方程（CSLE）和0.5米高分辨率世界观卫星图像的区域规模的土壤侵蚀，从中解释了土壤和水资源保护（SWC）工程实践作为E因子的模型中。我们将云南省云南省云南省以案例研究为例，成功地测试了该方法，估计了该地区的侵蚀模量和土壤侵蚀强度。该模型与源自47径流图的测量数据验证;结果表明，CSLE的测定系数为0.89，表示高精度。在省级的平均侵蚀模量为12.56吨（-1）.a（-1），具有高侵蚀模量的区域主要分布在中央和东北部。土壤侵蚀面积总为104,727.74公里（2），占总面积的27.33％。在农田中出现超过77％的中间侵蚀。我们的研究是将高精度SWC工程措施数据纳入区域土壤侵蚀调查的第一次努力。我们的方法降低了低数据精度引起的土壤侵蚀估计误差，克服了获得关于区域SWC措施信息的技术瓶颈，并提供了一种评价区域土壤侵蚀的实用和低成本方法。

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