共查询到19条相似文献,搜索用时 78 毫秒
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灰色聚类法在水环境质量评价中的应用 总被引:18,自引:1,他引:18
用灰色聚类法对乐山市境内的岷江、大渡河、体泉河的水环境质量进行评价,并与水质距离评价法、综合污染指数法进行比较。结果表明,灰色聚类法也是一种对水环境质量评价的实用方法。 相似文献
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宜宾市主要江河水质现状及污染防治对策 总被引:7,自引:0,他引:7
本文根据对宜宾市主要河流多年的地表水质监测数据和污染源排污状况的综合分析,阐明了金沙江,岷江,长江宜浓段的水环境质量状况和污染成因,提出了水污染防治对策,为政府决策提供了科学依据。 相似文献
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岷江流域地表水水质的模糊综合评价 总被引:1,自引:1,他引:1
岷江是长江上游的一个重要支流,其水质安全对维持成都平原正常的生产生活起着至关重要的作用。采用模糊综合评价的方法,对岷江流域14个地表水监测断面的水质状况进行了综合评价。结果表明:在14个监测断面中,处于清洁和未污染程度的断面占50%,主要位于岷江流域的上游和下游,其水质状况较好;处于重污染的断面占29%,主要位于岷江流域的中游,水质状况较差。因此,需要加强流域综合治理尤其是对岷江中游的治理,以确保岷江流域的水质安全。 相似文献
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岷江上游地区生态环境现状遥感解译分析 总被引:6,自引:1,他引:6
本文通过运用卫星遥感技术对岷江上游地区土地覆盖类型的调查,结合地面统计资料,综合分析了岷江上地区以森林,草地为主要类型的生态环境现状,并对该地区1988年至2000年时间跨度内土地覆盖状况的动态变化作出分析。 相似文献
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产品贸易及水权交易使得水资源问题"跨流域化",不再单纯是流域内部管理问题。本文从流域比较视角出发,在区分蓝、绿、灰三种水足迹的基础上,应用水足迹模型,测算了两流域典型地区的水足迹,进行流域水资源问题对比分析,并分析了经济发展模式对流域水资源可持续性的影响。结果发现,杭州市经济用水中灰色水足迹占总量的90%,而张掖市经济用水中绿色水足迹占总量的60.8%,说明钱塘江流域水资源问题在于质,而黑河流域水资源问题在于量;经济发展模式中的产业结构、水资源开发效率、工业化路径等影响流域水资源可持续利用,同时基于GDP导向的流域间的水资源逆向配置,更加剧了流域水资源矛盾。最后根据流域对比结果提出治理措施,从而形成流域间协作的良性循环。 相似文献
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Stephen P. Opsahl Scott E. Chapal David W. Hicks Christopher K. Wheeler 《Journal of the American Water Resources Association》2007,43(5):1132-1141
Abstract: In the karstic lower Flint River Basin, limestone fracturing, jointing, and subsequent dissolution have resulted in the development of extensive secondary permeability and created a system of major conduits that facilitate the exchange of water between the Upper Floridan aquifer and Flint River. Historical streamflow data from U.S. Geological Survey gaging stations located in Albany and Newton, Georgia, were used to quantify ground‐water and surface‐water exchanges within a 55.3 km section of the Flint River. Using data from 2001, we compared estimates of ground‐water flux using a time adjustment method to a water balance equation and found that these independent approaches yielded similar results. The associated error was relatively large during high streamflow when unsteady conditions prevail, but much lower during droughts. Flow reversals were identified by negative streamflow differences and verified with in situ data from temperature sensors placed inside large spring conduits. Long‐term (13 years) analysis showed negative streamflow differentials (i.e., a losing stream condition) coincided with high river stages and indicated that streamflow intrusion into the aquifer could potentially exceed 150 m3/s. Although frequent negative flow differentials were evident, the Flint River was typically a gaining stream and showed a large net increase in flow between the two gages when examined over the period 1989‐2003. Ground‐water contributions to this stream section averaged 2‐42 m3/s with a mean of 13 m3/s. The highest rate of ground‐water discharge to the Flint River occurred during the spring when regional ground‐water levels peaked following heavy winter and spring rains and corresponding rates of evapotranspiration were low. During periods of extreme drought, ground‐water contributions to the Flint River declined. 相似文献
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论成都的环境用水和水生态环境建设 总被引:13,自引:0,他引:13
本文首次提出环境用水概念,指出水质、水量、水面是环境用水的基本要素。阐述了环境用水对成都城市发展的重要意义。就成都环境用水目前存在的问题提出了解决途径。结合府南河综合整治工程,就成都的水生态环境建设提出建议。 相似文献
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硫磺沟煤矿3#井矿井水处理措施分析 总被引:2,自引:0,他引:2
硫磺沟煤矿紧邻头屯河,多年以来煤矿矿井水未做任何处理直接排入头屯河,已经对头屯河造成了污染。本文根据硫磺沟煤矿3^#井矿井水涌水量、水质情况及处理后所排入水体的标准要求,确定矿井水处理工艺、主要处理构筑物及技术参数,以使矿井水达标排放,减轻对头屯河水的污染。 相似文献