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- W4313384433 abstract "The peninsular bound rivers in the state of Bihar join the median principal drainage, River Ganga along its south bank flowing from south to north. These emanate mostly from the rocky uplands of the Chotanagpur Gneissic Complex, a few from the Vindhyans, Bihar Mica Belt, Gondwanas and other geological formations. Amongst them, River Falgu has its emergence from the Chotanagpur Gneissic Complex and is a promising repository for sand used for construction purposes. Understandably, there is a composite licence awarded by the state government to harness the sand potential of the river along its fertile stretches which is sometimes unchecked from the point of view of mining complying with the requisites of existing guidelines. The region which experiences hot and humid climate conditions has suffered irreversible vagaries in the past few decades with a conspicuous decrease in the overall precipitation, thus influencing the groundwater conditions. The recent past is replete with climatic surprises from unexpected rainfall in a couple of seasons to intimidating drought-like conditions in others. Undoubtedly, these events cannot be segregated from short-term climatic changes which are now affecting different parts of the country with a certain amount of regularity. This has influenced the sedimentation pattern and carrying capacity of the river. The aspect of sedimentation in a stretch of one of the peninsular bound rivers viz. Phalgu, originating from Chotanagpur Gneissic Complex (CGC) and debouching into the River Ganga near Patna district, forms the soul of the present study in light of fluctuation in sedimentation pattern, anthropogenic interference (particularly aberrations in sand mining), the effect of cross drainage structures (viz. barrage, bridge, weir) and diversion of the streamflow for various irrigational purposes which together or in isolation have greatly influenced the ecological health of the river. The study has been carried out on 11 no Sand Mining ‘Ghats’ officially identified as lease areas for minor minerals in Jehanabad district, Bihar along the course of River Phalgu. Studies reveal that anthropogenic activities are significantly affecting the river bed morphology by influencing sediment supply and transportation in the river basin. Transportation of sediment is the predominant work of the river through various hydrological processes such as a solution, suspension, saltation and traction under highly fluctuating hydrodynamic conditions, but decreased precipitation has affected the carrying capacity of the river. This chapter deals with the tight rope walking in arriving at the best possible balance resulting from environmental safety guideline procedures involved in mining, safeguarding the ecology of the river amidst challenges and ways to minimize the unprecedented effects of short-term climatic change. It also highlights aspects like drivers responsible for the reduced flow, erratic modes of sand deposition vis-a-vis undisciplined extraction and recommendations towards sustainable exploitation in tune with the expectation and guidelines served by the Hon’ble National Green Tribunal in this case along Phalgu River, in Jehanabad district, Bihar." @default.
- W4313384433 created "2023-01-06" @default.
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- W4313384433 date "2022-01-01" @default.
- W4313384433 modified "2023-09-26" @default.
- W4313384433 title "Anthropogenic Interference and Climatic Changes Influencing Precipitation, Sediment Load and Sand Deposition by the Phalgu River in and Around Jahanabad District, Bihar: A Case Study" @default.
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- W4313384433 doi "https://doi.org/10.1007/978-3-031-16254-1_7" @default.
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