摘要
华北某地下水水源地是一个埋藏型岩溶水系统,含水层为奥陶系灰岩。在开采地段施工15眼开采井,根据开采井的出水能力和开采井之间的干扰(影响)情况,以开采量作为决策变量建立目标函数,以水位降深为约束条件,建立地下水开采管理模型,利用单纯形法求解线型规划模型。共考虑开采井总数依次是9、10、11、12、13、14和15眼的7种开采方案。结果表明,方案一至方案七的实际开采井总数是91、0、11、11、11、13和13眼,各井优化开采量不尽相同,大者达2×104m3/d左右,总降深最大值依次为113.4、124.0、135.3、134.2、134.2、156.0和156.0 m,总开采量均达到10×104m3/d的水源地供水要求。宜优先考虑开采井总数较少的开采方案。
The groundwater wellfield is a karst aquifer system of burial-type consisting of Ordovician limestone in Northern China. Fifteen wells were drilled for use in the wellfield. Taking the well discharge and influence between the wells into account, a management model is established, in which withdrawal rates of the wells are described as decision variables, and drawdowns of the wells, as constraints. Simplex method is used to solve the liner progrmmning models. Seven withdrawal schemes are considered, in which the total number of production wells is 9, 10, 11, 12, 13, 14 and 15 respectively. The results of optimization show that the actual total number of production wells from scheme 1 to scheme 7 is 9, 10, 11, 11, 11, 13 and 13 respectively, and the withdrawal rates for the selected wells are different among them with the maximum rate being 2 x 104 m3/d. The total drawdown for production wells from scheme 1 to scheme 7 is 113.4, 124.0, 135.3, 134.2, 134.2, 156.0 and 156.0m respectively. The total withdrawal rate for all the 7 withdrawal schemes meets the requirement of water supply of the wellfield of 10 × 10^4 m^3/d. The withdrawal schemes with smaller number of production wells are of high priority in practical use.
出处
《勘察科学技术》
2007年第3期46-49,共4页
Site Investigation Science and Technology
关键词
水源地
管理模型
线性规划
开采方案
地下水
wellfield
management model
linear programming
withdrawal scheme
groundwater
