Study On Design Theory Of Groundwater Reservoir In Porous Mediums

Considering the perspective of water conservancy engineering, hydrogeology and soil mechanics, this paper aims at studying on the design theory of groundwater reservoir in porous mediums.The classification method for groundwater reservoir basing on water-storing medium is proposed to reflecting the essential characteristics of groundwater reservoir. Basic conditions for underground water-storing structures are discussed, groundwater reservoir forming conditions are consummated. Based on groundwater dynamics, the dynamic design method for groundwater reservoir is proposed, it considers the influence of the lowest groundwater level upon groundwater regulation, it can reflect the real groundwater elevation, and reasonably determine the design scheme and project scale of groundwater reservoir.The recharge well with filter layer is constituted of general recharge well and recharge pond, the recharge pond locates the mouth of the recharge well and has filter function. The steady flow calculation and structure design for recharge well with filter layer is researched systematically. Firstly, the well flow characteristic of recharge well with filter layer is analyzed, and field recharge test of recharge well with filter layer has been done, and main influence factors upon recharge volumes are analyzed, and steady flow formulae are deduced, and parameters in steady flow formulae are studied, and the rationality of steady flow formulae is validated through examples. Secondly, siltation factors of recharge well with filter layer are analyzed, the steady flow formulae of recharge well with filter layer are obtained when the surface of recharge well is silted. Another, the basic design principle and design method of recharge pond for recharge well with filter layer are studied. The design and calculation of recharge well with filter layer are solved.Through doing one-dimensional equal amplitude circulating compression test on sand, the compression and resilience deformations of the aquifer are simulated with the groundwater level rising or falling, the change of regulation for reduction rate of porosity with circulating number is constructed, the reduction rate of porosity is proposed, the influence of groundwater level rising or falling upon the volumes of groundwater reservoir is evaluated by the reduction rate of porosity, a conclusion is obtained that rising or falling of groundwater level will can not affect using of groundwater reservoir.