Quantification of landuse changes driven by the dynamics of the Jamuna River, a giant tropical river of Bangladesh

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Md. Mahin Uddin , Md. Bodruddoza Mia , Md. Yousuf Gazi , A.S.M. Maksud Kamal
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引用次数: 0

Abstract

Changes in river bank location have wide consequences on floodplain communities and the sustainability of floodplain ecosystems. Although river dynamics are monitored globally and locally, understanding the impact of riverine dynamics on land use change remains a challenge. Bangladesh, part of the Bengal Delta, is mostly made up of alluvial deposits and is crisscrossed by so many rivers. Jamuna is one of the prominent rivers in this region. This study presents a consistent evaluation of the dynamics of the Jamuna river and ensuing changes in land use over 48 years (1972–2020) depending on satellite observations and geospatial analysis. Changes in the presence of water were used to estimate the advance/retreat of the banks and loss/gain of land along 257 perpendicular transects along the common pattern of the centerlines of the river. We found that the overall loss of agricultural land was about 535.01 km2, sevenfold of the gained agricultural land. Other land use losses were bare lands 136.73 km2, waterbodies 80.37 km2, settlement 67.28 km2 and vegetation 132.79 km2 against 48.47 km2, 3.52 km2, 23.76 km2 and 6.14 km2 land use gains respectively. Agricultural land loss impacts the livelihood of the floodplain dwellers and settlement loss causes internal migration. This pattern of land use change driven by the river dynamics has created newer environmental challenges and additionally, climate change may intricate the situation in the future. The findings of this study throw insight into the fact and may aid in sustainable river training measures and floodplain management.

对孟加拉国一条巨大的热带河流--贾木纳河的动态变化所驱动的土地利用变化进行量化
河岸位置的变化会对洪泛区群落和洪泛区生态系统的可持续性产生广泛影响。虽然全球和地方都对河流动态进行了监测,但了解河流动态对土地利用变化的影响仍是一项挑战。孟加拉国是孟加拉河三角洲的一部分,主要由冲积层组成,河流纵横交错。贾木纳河是该地区的主要河流之一。本研究通过卫星观测和地理空间分析,对贾木纳河 48 年(1972-2020 年)的动态以及随之而来的土地利用变化进行了持续评估。我们利用水流的变化来估算沿河中心线共同模式的 257 条垂直横断面上河岸的前进/后退和土地的损失/增加。我们发现,农业用地的总体损失约为 535.01 平方公里,是农业用地增加量的七倍。其他土地利用损失包括裸地 136.73 平方公里、水体 80.37 平方公里、居民点 67.28 平方公里和植被 132.79 平方公里,而土地利用收益分别为 48.47 平方公里、3.52 平方公里、23.76 平方公里和 6.14 平方公里。农业用地的丧失影响了洪泛区居民的生计,而定居点的丧失则导致了内部移民。这种由河流动态驱动的土地利用变化模式带来了新的环境挑战,此外,气候变化也可能在未来使情况变得更加复杂。本研究的结果使我们对这一事实有了深入的了解,并有助于采取可持续的河流治理措施和洪泛区管理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
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