通过人口变化评估人类对河岸侵蚀的反应 - - 一项关于西孟加拉邦马尔达地区的研究
Nilanjana Biswas1, Sayani Mukhopadhyay2
1Asutosh College, Kolkata, 700026, India. uni.nilanjana@gmail.com.
Environmental monitoring and assessment
|March 24, 2025
概括
马尔达的甘河沿岸的河岸侵蚀改变了沉积模式,影响了居民. 强烈的侵蚀最初减少了人口密度,但后来增加了边际劳动力库存,促使生计变化和定居模式转变.
科学领域:
- 地质形态学和河流动力学
- 人类地理学和社会经济学研究
背景情况:
- 马尔达的甘河左岸表现出动态的边缘线移动.
- 了解这些地形变化及其社会经济影响对于区域规划至关重要.
研究的目的:
- 分析 43 年 (1980-2022) 期间,甘河的道转移动态.
- 调查马尔达居民对银行侵蚀和沉积的相应反应.
主要方法:
- 数字海岸线分析系统 (DSAS) 模型用于计算银行侵蚀率.
- 多重对应分析和人口统计数据的部分最小平方回归.
- 对焦组调查 (N=131) 用于结果验证.
主要成果:
- 净侵蚀在1980-1990年间最强烈;沉积在2000年后超过了侵蚀,侵蚀焦点向南移动.
- 强烈的侵蚀导致人口密度下降,种植人口和农业劳动力.
- 后来的时期 (2001-2011) 看到边际劳动力库存的增加和更高的识字率,边际劳动力变化在1991-2001年之间占主导地位.
结论:
- 变化的河流动力学显著改变了社会经济结构和定居模式.
- 由于耕作造成的生计不确定性导致职业变化,并影响居民与土地的联系.
- 政府的迅速干预是必要的,以应对河岸侵蚀及其后果所带来的挑战.
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