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Assessment of Land Degradation Vulnerability using Geospatial Technique: A Case Study of Kachchh District of Gujarat, India
Journal of the Indian Society of Remote Sensing ( IF 2.5 ) Pub Date : 2021-03-23 , DOI: 10.1007/s12524-021-01349-y
Manish Parmar , Zalak Bhawsar , Mit Kotecha , Alpana Shukla , A. S. Rajawat

Land degradation is decline in productivity of land in terms of bio-diversity and economy, resulting from various causes including climate and human dominance, leading to loss of ecosystem. It is an issue of global concern and threatens productivity of land, water, biodiversity, ecology, economy, and people. India, with 2.4% of global land area, is homeland for around 18% of global human population and 30.4% livestock population, supporting more than 8% of world’s agriculture with more than 69% area falling under drylands. The blend of high population, high agriculture production and diverse agro-climatic conditions results in excessive pressure on resources. This study is an attempt to access land degradation vulnerability considering human-induced factors, biophysical and climate parameters. Hierarchy-based indexing method is used for analysis using geospatial technique. Study reveals that around 67% of the land area falls under high vulnerability, and 27% area falls under moderate vulnerability. The outcome was further compared with MODIS land surface temperature and normalised difference vegetation index data for validation and is observed that more than 85% area under moderate–high vulnerability is related to increase in surface temperature and/or no-change in vegetation index; this area also falls under low NDVI value range (< 0.3), indicating vulnerable to land degradation. The outcome is useful for stakeholders in understanding the issue and for preparing action plans for combating land degradation.



中文翻译:

利用地理空间技术评估土地退化的脆弱性:以印度古吉拉特邦Kachchh区为例

土地退化是指由于各种原因(包括气候和人类主导地位)导致生态系统丧失而造成的生物多样性和经济方面的土地生产力下降。这是一个全球关注的问题,威胁着土地,水,生物多样性,生态,经济和人民的生产力。印度占全球土地面积的2.4%,是全球约18%人口和30.4%牲畜人口的家园,为世界超过8%的农业提供支持,其中超过69%的土地属于干旱地区。高人口,高农业产量和多样化的农业气候条件的结合,导致对资源的过度压力。这项研究是在考虑人为因素,生物物理和气候参数的情况下获得土地退化脆弱性的尝试。基于层次结构的索引方法用于使用地理空间技术进行分析。研究表明,大约67%的土地面积属于高脆弱性,而27%的土地处于中等脆弱性。将该结果与MODIS地表温度和归一化植被指数数据进行了比较,以进行验证,并观察到中高脆弱性下超过85%的面积与地表温度升高和/或植被指数没有变化有关;该区域也处于NDVI值较低的范围内(<0.3),表明容易受到土地退化的影响。结果对于利益攸关方了解问题和制定打击土地退化的行动计划很有用。27%的区域属于中等脆弱性。将该结果与MODIS地表温度和归一化植被指数数据进行了比较,以进行验证,并观察到中高脆弱性下超过85%的面积与地表温度升高和/或植被指数没有变化有关;该区域也处于NDVI值较低的范围内(<0.3),表明容易受到土地退化的影响。结果对于利益攸关方了解问题和制定打击土地退化的行动计划很有用。27%的区域属于中等脆弱性。将该结果与MODIS地表温度和归一化植被指数数据进行了比较,以进行验证,并观察到中高脆弱性下超过85%的面积与地表温度升高和/或植被指数没有变化有关;该区域也处于NDVI值较低的范围内(<0.3),表明容易受到土地退化的影响。结果对于利益攸关方了解问题和制定打击土地退化的行动计划很有用。将该结果与MODIS地表温度和归一化植被指数数据进行了比较,以进行验证,并观察到中高脆弱性下超过85%的面积与地表温度升高和/或植被指数没有变化有关;该区域也处于NDVI值较低的范围内(<0.3),表明容易受到土地退化的影响。结果对于利益攸关方了解问题和制定打击土地退化的行动计划很有用。将该结果与MODIS地表温度和归一化植被指数数据进行了比较,以进行验证,并观察到中高脆弱性下超过85%的面积与地表温度升高和/或植被指数没有变化有关;该区域也处于NDVI值较低的范围内(<0.3),表明容易受到土地退化的影响。结果对于利益攸关方了解问题和制定打击土地退化的行动计划很有用。

更新日期:2021-03-24
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