基于多准则决策方法的小喜马拉雅地区土壤侵蚀易感子流域优选

S. Pandey, Parmanand Kumar, V. Panwar, R. Nautiyal
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引用次数: 0

摘要

小喜马拉雅地区的流域极易受到自然灾害的影响,特别是那些由水的作用和运动引起的自然灾害,如土壤侵蚀、洪水和大量土地运动。土地利用多样化和生态系统脆弱的丘陵流域是加速土壤侵蚀的原因。土壤侵蚀是最潜在的危害之一,因为它使流域的水和土壤质量退化。该研究优先考虑了小喜马拉雅地区顿河流域(印度)的土壤侵蚀易感区。研究了形态、土壤质量、坡度和土地利用在土壤侵蚀中的相互关系和作用。利用遥感数据和多准则决策方法(MCDM)框架对流域土壤侵蚀敏感性进行估算。结果表明,流域延伸率和坡度等形态计量参数对流域侵蚀状态起主要作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Prioritization of Soil Erosion-Susceptible Sub-Watersheds Using Multi-Criteria Decision Method in the Lesser Himalayas
Watersheds in the Lesser Himalayan region are highly susceptible to natural hazards, particularly those instigated by action and movement of water, such as soil erosion, flood, and mass movements of lands. Hilly watersheds with diversified land use and fragile ecosystems are responsible for accelerating soil erosion. Soil erosion is one of the most implicit hazards as it degrades water and soil quality in a watershed. The study prioritizes the soil erosion-susceptible zones in the Tons river watershed (India) in the Lesser Himalayan region. The interrelationships and role of morphometry, soil quality, slope, and land use together as four components in soil erosion are studied. Remote sensing data and multi-criteria decision method (MCDM) framework has been used to estimate soil erosion susceptibility of sub-watersheds. Results showed that morphometric parameters like elongation ratio and slope of sub-watersheds play a major role in determining the state of erosion.
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