Application of Modified MAR Model in Barnai River Basin, NW Bangladesh: A Performance Study
Mohammad Iquebal Hossain,
Niamul Bari,
Shafi Uddin Miah,
Mohammad Ferozur Rahaman,
Chowdhury Sarwar Jahan
Issue:
Volume 7, Issue 2, June 2019
Pages:
24-31
Received:
20 April 2019
Accepted:
23 May 2019
Published:
1 July 2019
Abstract: Present study aims to evaluate performance analysis of modified recharge well (RW) technique of the Managed aquifer Recharge (MAR) models for rain water from rooftop of office building and that of runoff water from Kharoil Beel (Swamp) harvesting approach in Barnai river basin, north-western part of Bangladesh. In the area, the lower amount of rainfall than country-wide average as well as less infiltration capacity of thick top clay layer lies above the potential aquifer at higher depth put constrain for groundwater resource development against its ever increasing demand day by day along with limited scope to conserve surface water in rivers, Kharies (canals), Beels etc. The performance of modified MAR model for recharge rate calculation with a goal to restore declining trend of groundwater level (GWL) are found good without any quality hazard. Moreover, for continuous operation and better performance of MAR model, regular monitoring and maintenance are necessary along with in-depth research activities to address the burning water scarcity for drinking and irrigation management issue as viable option in sustainable way.
Abstract: Present study aims to evaluate performance analysis of modified recharge well (RW) technique of the Managed aquifer Recharge (MAR) models for rain water from rooftop of office building and that of runoff water from Kharoil Beel (Swamp) harvesting approach in Barnai river basin, north-western part of Bangladesh. In the area, the lower amount of rain...
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Experimental Study of the Dominant Flow Paths and Analysis of the Influence Factors Through Fracture Networks
Mu Wang,
Fengjun Gao,
Jiazhong Qian
Issue:
Volume 7, Issue 2, June 2019
Pages:
32-37
Received:
11 July 2019
Accepted:
12 August 2019
Published:
26 August 2019
Abstract: As the main carrier of groundwater in nature, water transport behavior in fracture networks and identification of its main control factors are challenging problems in hydrogeology. Laboratory experiments are designed in this paper using fracture networks made of Perspex plate for a series of hydraulic tests. Using the conditions of different types of connections for inlet and outlet, temperature tracing tests are conducted for determining dominant flow paths. The flow resistances are calculated at different points, and the control factors of the dominant flow paths are then discussed. Three major conclusions are obtained: (1) the existence of the dominant flow phenomenon in fracture networks is verified; (2) the dominant flow paths can be ascertained by monitoring the temperature variation of hot water in complex fracture networks; (3) the flow resistance is the most fundamental reason for forming dominant flow: the channel with less resistance is selected as the dominant path.
Abstract: As the main carrier of groundwater in nature, water transport behavior in fracture networks and identification of its main control factors are challenging problems in hydrogeology. Laboratory experiments are designed in this paper using fracture networks made of Perspex plate for a series of hydraulic tests. Using the conditions of different types ...
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