Spatial analysis of groundwater quality for drinking purpose in Sirjan Plain,Iran by fuzzy logic in GIS          下载免费PDF全文

Negar Fathi  Mohammad Bagher Rahnama  Mohammad Zounemat Kermani 《地下水科学与工程》2020,8(1):67-78

At present,due to shortage of water resources,especially in arid and semiarid areas of the world such as Iran,exploitation of groundwater resources with suitable quality for drinking is of high importance.In this regard,contamination of groundwater resources to heavy metals,especially arsenic,is one of the most important hazards that threaten human health.The present study aims to develop an approach for presenting the groundwater quality of Sirjan city in Kerman Province,based on modern tools of spatial zoning in the GIS environment and a fuzzy approach of evaluating drinking water in accordance with the standards of world health organization(WHO).For this purpose,qualitative data related to 22 exploitation wells recorded during 2002 to 2017 were used.In addition,fuzzy aggregate maps were prepared in two scenarios by neglecting and considering arsenic presence in groundwater resources.The results showed a decrease in groundwater quality over time.More specifically,neglecting the presence of arsenic,in 2002,all drinking wells in the area were located in an excellent zone,while in 2017 a number of operation wells were located in the good and medium zone.Also,the final map,considering the presence of arsenic as a limiting factor of drinking water,indicated that parts of the southern regions of the plain would be the best place to dig wells for drinking water.Therefore,the use of new methods can contribute significantly to the usage of groundwater aquifers and provide a good view of the aquifer water quality.  相似文献   

基于层次分析法和模糊评判法的西藏国家气象公园评价研究     

四郎措姆  熊亚军  洛桑卓嘎  洛松桑邓  边巴江村  旦增克珠 《气象与环境学报》2022,38(3):162-168

本研究依据中国气象局发布的国家气象公园评价指标体系充分考虑高原文化特色, 采用层次分析法(AHP)构建了适用于高原的气象公园评价体系。结果表明: 在准则层中, 天气景观＞人文气象景观＞环境保护＞科学性, 权重值分别为45.94%、32.48%、14.91%、6.67%, 在因子层中, 稀有度＞人文价值＞气候特征＞科学性, 权重值依次为25.80%、17.20%、9.70%、5.00%。在此基础上, 对纳木措、羊卓雍措、玛旁雍措进行模糊综合评价分析表明, 纳木措各因素综合评价为优, 羊卓雍措各因素综合评价为良, 玛旁雍措各因素综合评价为良。因此, 在经济条件有限的基础上, 认为纳木措建设成为国家气象公园是最优选择。本研究结果可为环境规划等相关部门和行业提供决策参考。  相似文献   

基于信息扩散原理的渤、黄海沿岸风暴潮灾害风险分析   总被引：2，自引：1，他引：1       下载免费PDF全文

齐鹏  李明杰  侯一筠 《海洋与湖沼》2010,41(4):628-632

根据收集的渤、黄海沿岸主要海洋站(塘沽、羊角沟、烟台、威海、乳山口、青岛和日照)1950年以来各年最高潮位资料(个别站位资料样本较小),应用能优化处理小样本的基于信息扩散原理的模糊风险评估模型,对渤、黄海沿岸各海洋站年最高潮位的多年一遇极值情况进行了超越概率计算,并与《港口工程技术规范》推荐的极值I型(Gumbel曲线)方法进行比较。除羊角沟站误差3%外,其它站误差均在2%及以下,表明文中基于信息扩散原理的风险评估模型在兼顾小样本条件下所给结果是比较可靠的。这对于潮位等水文实测资料短缺的新建或拟建工程区进行工程水文要素设计重现期的推算将有较好的帮助。  相似文献