Aquatic Sciences ( IF 2.0 ) Pub Date : 2023-07-28 , DOI: 10.1007/s00027-023-00988-2
Suman Mitra , Madhurima Purkait , Ankana Chatterjee , Jhantu Dey , Sunil Kumar De , Lakpa Tamang
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This study compares the hydromorphological quality of two sub-Himalayan Rivers, the Mahananda–Balason system (MBS) and the Chel–Neora system (CNS), to analyse the role of human intervention in channel hydromorphology. An indicator-based assessment, developed by Mitra et al. (Adv Space Res 71:1397–1417, 2022), is adopted here to obtain the hydromorphological quality. A hypothesis test using a two-tailed t-test and principal component analysis (PCA) is performed to identify the reaches with similar hydromorphological conditions along with aspects that needed restoration. Results show that the hydromorphological condition is highly influenced by the intensity of human alterations, and their interrelations are strongly proportionate. While the hydromorphological quality of unconfined MBS is highly degraded, that of unconfined CNS and the confined reaches of both systems have remained almost at their least disturbed condition (LAC). Intensive human interventions on MBS have impacted the groundwater table, riverine sediments, and fish habitat. Now, to maintain sustainability regarding riverine resources of CNS, close and regular monitoring must be initiated, and this methodology can serve that purpose. Being dependent on monitoring the ongoing interventions and the channel's physical forms, assessment protocols like this can serve the purpose of rapid hydromorphological assessment for the river systems of data-scarce regions.
中文翻译:
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分析人为干预在印度喜马拉雅山以下河流水系重新配置中的作用:马哈南达-巴拉森和切尔-尼奥拉系统之间的比较评估
本研究比较了马哈南达-巴拉森水系(MBS)和切尔-尼奥拉水系(CNS)这两条亚喜马拉雅河流的水貌质量,以分析人类干预对河道水貌的作用。Mitra 等人开发的基于指标的评估。(Adv Space Res 71:1397–1417, 2022),此处采用以获得水形态质量。使用双尾t进行假设检验- 进行测试和主成分分析(PCA),以确定具有相似水貌条件的河段以及需要恢复的方面。结果表明,水文形态条件受人类改变强度的影响很大,并且它们之间的相互关系非常成比例。虽然无约束 MBS 的水形态质量严重退化,但无约束 CNS 和两个系统的约束区域的水形态质量几乎保持在最小干扰状态 (LAC)。对MBS的强烈人类干预影响了地下水位、河流沉积物和鱼类栖息地。现在,为了保持中枢神经系统河流资源的可持续性,必须启动密切和定期的监测,而这种方法可以达到这一目的。