泗县地区多目标水资源优化配置模型构建分析,水利工程硕士论文.docx
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1、泗县地区多目标水资源优化配置模型构建分析,水利工程硕士论文水是生命之源,生产之要、生态之基,对支撑区域协调发展具有不可替代的作用。现前阶段,区域取用水困难、供水水质难以保障等用水问题越发成为阻碍区域可持续发展的重要因素。为此,对区域水量开展优化调配研究,科学合理配置区域有限水资源,可在一定程度上缓解区域用水冲突问题。基于此,本文以安徽省泗县为研究区,考虑各用水部门和供水水源之间的配水关系,及供需水约束条件,选取经济效益最大、社会缺水量最小和污染物排放量最小为目的函数,建立泗县地区多目的水资源优化配置模型。模型采用NSGA-算法求解,根据生成的Pareto最优解集和多目的规划特点,确定了在不同保
2、证率下,各规划年水资源配置方案。主要内容及成果如下: 1选取2021年为现在状况年,对现在状况年泗县水资源开发利用程度评价,调查分析区域多年供需水变化经过,并结合以现在状况年生活、工业和农业等用水指标进一步讲明现在状况年泗县用水水平。 2综合分析泗县各规划、成果、公报等资料,在现在状况年基础上,选取2025年、2030年和2035年为规划年,对规划年经济、农业、人口等发展指标进行预测,采用定额法预测不同规划年需水量。并在现在状况年供水工程基础上,预测了在不同保证率下,各规划年可供水量。通过对规划年供需平衡分析可知,在保证率为P=50%、P=75%下,规划年区域取用水均可知足,不存在缺水现象;在
3、保证率为P=95%下,区域供需水矛盾冲突,各规划年将出现不同程度缺水现象。 3确定模型各参数,采用NSGA-算法求解模型,根据生成Pareto最优解集及多目的规划特点,确定水资源优化配置方案。优化配置结果表示清楚:在P=95%保证率下,各规划年总缺水量和缺水率分别为2485万m?、3331万m?、3600万m?和11.6%、14.5%、15.1%。与常规水资源配置方案相比,各规划年P=95%保证率下全县缺水率分别下降了1.0%、2.0%和2.7%。最后,针对规划年不同程度缺水现象,提出了泗县水资源合理开发利用的建议与对策。 本文关键词语: 泗县;多目的;水资源优化配置;NSGA-算法。 Abs
4、tract Water is the source of life, the key to production and the base of ecology, it playsan irreplaceable role in supporting regional coordinated development. At present, thewater problems such as the difficulty of regional water intake and water qualityguarantee have become the important factors h
5、indering the sustainable development ofthe region. Therefore, carrying out research on the optimal allocation of regional waterresources, scientifically and rationally allocating limited water resources, caneffectively alleviate the crisis caused by water shortage. Based on this, this paper takesSix
6、ian County of Anhui Province as the research area, considering the waterdistribution relationship between water use departments and water supply sources, themaximum economic benefit, the minimum social water shortage rate and the minimumpollutant emission are selected as the objective functions, est
7、ablish a multi-objectivewater resources optimal allocation model in Sixian County. The model was solved byNSGA - algorithm, according to the generated Pareto optimal solution and multi-objective programming characteristics, the water resources allocation scheme of eachplanning year is determined und
8、er different guarantee rates. The main contents andachievements are as follows: (1) Selecting 2021 as the current year, the development and utilization degree ofwater resources in Sixian county is evaluated, based on the actual water supply andwater demand for many years, the supply and demand trend
9、s of water sources and wateruse sectors are analyzed, the water consumption level of Sixian County is furtherillustrated by the water consumption indexes of living, industry and agriculture in thecurrent year. (2) Comprehensive analysis of the planning, achievements, communiques andother materials o
10、f Sixian County, on the basis of the current year, 2025, 2030 and 2035are selected as the planning years. Forecast the economic, agricultural, population andother development indicators in the planning year, water demand in different planningyears is predicted by quota method. And based on the curre
11、nt year water supply project,the available water supply in each planning year is predicted under different guaranteerates. Through the analysis of the balance of supply and demand in the planning year,we can see that, under the guarantee rate of P = 50% and P = 75%, the regional water intake in the
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