Modelling the potential impacts of climate change on hydrology and water resources in the Indrawati River Basin,Nepal     

Sangam Shrestha  Manish Shrestha  Mukand. S. Babel 《Environmental Earth Sciences》2016,75(4):280

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Groundwater Effect on Faulted Rock Mass: An Evaluation of Modi Khola Pressure Tunnel in the Nepal Himalaya   总被引：1，自引：0，他引：1  

Pawan Kumar Shrestha  Krishna Kanta Panthi 《Rock Mechanics and Rock Engineering》2014,47(3):1021-1035

Groundwater has a negative impact not only in construction activity, but also in stability of a tunnel. Severity increases particularly in tunnels passing through fault gouge and breccia, where rock material is completely crushed and extremely weak. Instantaneous collapse and excessive plastic deformation is most likely in tunnels passing through such zones. Often, ‘flowing’ conditions may prevail if groundwater is mixed in the rock mass. This paper presents one such tunnel case in the Nepal Himalaya; i.e. the Modi pressure tunnel. This pressure tunnel passes through a tectonic fault consisting of gouge material. High deformation in the tunnel was observed while excavating the tunnel through the fault. Based on the tunnel deformation that was actually measured, the paper first back-calculates the rock mass strength by analytical approach. Then, the extent of in-situ stress condition in the area is determined by numerical modeling for the rock mass with no ground water in consideration. The ground water effect is then analyzed. We found that the effect of ground water with a static head <1.5 bar pressure may increase the deformation by up to a maximum of 30 %. Finally, we briefly discuss uncertainties related to the input parameter study and used methodologies.  相似文献   

Development of RWQM1-based integrated water quality model in OpenMI with application to the River Zenne,Belgium   总被引：1，自引：1，他引：0  

Narayan Kumar Shrestha  Olkeba Tolessa Leta  Willy Bauwens 《水文科学杂志》2017,62(5):774-799

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