Department of Geography, Delhi School of Economics, University of Delhi, Delhi, 110007, India.
Department of Geography, University of Gour, Banga, India.
Environ Sci Pollut Res Int. 2024 Feb;31(9):14023-14042. doi: 10.1007/s11356-024-32094-7. Epub 2024 Jan 25.
The present study aimed to measure wetland inundation inconsistency level (IIL) at a spatial scale to appraise the potential serviceability in the Mayurakshi river basin of Eastern India. Inconsistency was used for measuring both wetland water presence area and proxy water depth based on historical satellite images from 1988 to 2022. Applying inconsistency assessment, it was tried to assess how water appearance at a pixel is inconsistent and how average proxy water depth is inconsistent to attain. Four manmade and natural floodplain wetland complexes were taken for this. The study revealed about 51-53% and 59-86% manmade and natural wetland losses respectively and the IIL was also found significantly higher (30-50%) in the cases of natural wetlands in pre and post-monsoon seasons. The scenario is worse in pre-monsoon season in the natural wetlands. Inconsistency of water depth anomaly (IWDA) was also significantly increased almost in the same trend. Discharge control through hydro-engineering structures like dams, barrages, and embankments; river and wetland connecting tie channel loss; and loss of groundwater support are some crucial reasons behind the hydrological inconsistency of wetlands. Growing loss and IIL are caused for concerned economic and ecological adversity. So, the findings would be very useful for taking necessary planning for wetland management and restoration.
本研究旨在测量湿地淹没不一致水平（IIL），以评估印度东部马尤拉基什河流域的潜在服务能力。基于 1988 年至 2022 年的历史卫星图像，使用不一致性来测量湿地水存在区域和代理水深。通过不一致性评估，尝试评估像素处的水出现情况如何不一致，以及平均代理水深如何不一致。为此，选择了四个人为和自然洪泛区湿地复合体。研究表明，人为和自然湿地分别损失了约 51-53%和 59-86%，并且在季风前和季风后季节，自然湿地的 IIL 也明显更高（30-50%）。自然湿地在季风前季节的情况更糟。水深异常不一致（IWDA）也几乎呈相同趋势显著增加。通过水坝、堤坝和堤岸等水工程结构控制流量；河流和湿地连接纽带通道损失；以及地下水支持的损失，是湿地水文不一致的一些关键原因。湿地的不断损失和 IIL 的增加，导致了相关的经济和生态逆境。因此，这些发现对于湿地管理和恢复的必要规划将非常有用。
