共查询到20条相似文献，搜索用时 718 毫秒
1.
通过实际调查资料,以地层岩性、构造稳定性、植被覆盖、土地沙漠化、地下水、地表水、工程地质条件、地质灾害等8个生态评价因子,采用模糊数学方法,对济南都市圈生态地质环境质量进行了评价。建立了济南都市圈生态地质环境质量评价模型,为政府规划或技术管理部门决策提供可靠的科学依据。 相似文献
2.
基于GIS的略阳县地质环境质量评价 总被引：11，自引：4，他引：7
基于地理信息系统(GIS)和多级模糊模式识别模型,建立了略阳县空间数据库和地质环境质量评价模型;综合考虑地形坡度、工程地质岩组、岩土体结构类型、地下水位、植被发育情况、月平均降雨量、人类工程活动强度等因素,用层次分析法确定各指标权值,应用评价模型对略阳县地质环境质量进行了综合评价,把略阳县地质环境划分为优、良、中、差4个质量级别。 相似文献
3.
4.
5.
为查明高店子幅地表水和地下水的水化学特征及水环境质量现状，为区域水资源保护与开发提供理论依 据，运用数理统计分析、模糊综合评价和灌溉水水质评价方法对研究区地表水和地下水进行了分析与评价。研究 结果表明:研究区地表水水化学组分波动较大，地下水水化学组分相对较为稳定。地表水水化学类型主要为重碳 酸硫酸－钙镁型水和重碳酸－钙镁型水；地下水水化学类型主要为重碳酸－钙镁型水和重碳酸硫酸－钠 钙 镁 型 水。研究区地表水和地下水水力联系密切，水中主要离子组分来自于盐岩、石膏和碳酸盐的风化溶滤，另 外 还 存 在阳离子交换作用、蒸发浓缩作用和人类活动的共同影响。饮用水水质评价表明，５４．５％的地表水和７１．４％的地 下水适于饮用或基本适于饮用，地下水水质稍好于地表水水质；灌溉水水质评价表明，研究区地表水和地下水均 适于灌溉，合理灌溉不会造成盐害和碱害。 相似文献
6.
黄河下游山东段河道带稳定性受控于新构造运动、活动断裂、地震烈度、河流动力地质作用、河道带地貌结构、土体性质及人为地质工程体性质等因素。该段河道带可分为四个地质环境质量区,据其对河道稳定性的影响程度,确定了地壳稳定性、堤基堤身稳定性、地面稳定性为评价主因子,同时确定了分级评价因子及分值,并采用“因素叠置法”分区进行计算与评价。河道带稳定性评价结果表明：游荡型河道地质环境质量区和尾闾型河道地质环境质量区较不稳定,过渡型河道地质环境质量区较稳定,弯曲型河道地质环境质量区为稳定。 相似文献
7.
多级模糊模式识别模型在地质环境质量评价中的应用 总被引：10，自引：5，他引：5
应用多级模糊模式识别模型进行地质环境质量评价,克服了最大隶属度原则所不适用的地方,而且以相对隶属度、隶属函数为基础理论,使隶属度、隶属函数的计算更容易.建立环境质量评价模型,并应用于陕西省略阳县地质环境质量综合评价中,应用结果表明,该方法合理、可行. 相似文献
8.
结合泰安市地下空间开发利用现状,分析了地质环境特征与地下工程建设和地下空间开发的相互影响机制。采用层次分析法,从工程地质条件、水文地质条件、环境地质问题和不良地质作用等方面建立了地下空间适宜性评价指标体系,构建分析模型;通过综合确定各指标的权重,以GIS软件空间叠加分析功能自动划分评价单元,对泰安市地下空间开发的地质环境适宜性进行了分区评价。同时,通过对各分区地质条件的说明对适宜性分区结果进行了分析和验证,以期为泰安市地下空间开发利用建设提供决策依据。 相似文献
9.
10.
选取综合指数法为主要研究方法,在充分分析和借鉴前人研究经验的基础上,建立了适合山东省地质环境状况的评价指标体系,并对山东省各地市目前的地质环境质量进行了总体评价。研究中选取区域地质条件、地质灾害、人类活动和资源4个指标,各指标下又划分了若干子指标,构成了山东省地质环境质量评价的三级指标体系;然后运用层次分析法确定各指标的权重,并对相关数据进行计算,得出山东省各地市的地质环境质量的综合指数;最后根据各地市的综合指数得分将山东省地质环境质量划分为3类：即地质环境条件相对较好的鲁西鲁北地区、地质环境质量居中的胶东半岛地区和地质环境质量较差的鲁中山区。 相似文献
11.
针对陕西省交口抽渭灌区灌溉渠网纵横，灌溉期渭河水源水量不足的实际，提出开采当地微咸与咸的地下水，注入引水渠道，使地表水与劣质地下水在渠道内混合，搭载淡水降低地下水的矿化度，增大供水水量，从而使部分劣质地下水直接资源化。其思路对西北及其他高矿化度地下水分布区，有引淡水条件的地区将具有实际意义，对扩大地下水资源的范围也将产生一定的影响。 相似文献
12.
Ever growing demand for water for agricultural activities in the Izeh Plain has enhanced the use of groundwater. Due to enormous groundwater abstraction since 1985, the overall static water level has receded by more than 5 meters reflecting that the aquifer is under stress condition. As a result, interest is focused on application of artificial recharge as an option for groundwater management to augment water supply in this area. Therefore, in the present investigations, suitable sites for artificial recharge were selected by an integrated surface and sub-surface assessment of the area. On the basis of the data collected from four target points, it was realized that the selected sites for artificial recharge could not meet water demand of the area. In this study attention was also paid to utilization of the existing Miangran Lake water as an alternative to combat water shortage for irrigation. The study further indicated that the available Miangran Lake water could be used for irrigation of the reclaimed agricultural land and enabling to convert 20o0 hectares of rain-fed land into irrigation. The total cost to utilize lake water is US$ 2,756,729 and it was estimated that the project could recoup the investment within 5 years which is quite reasonable in this water scarcity prone area. 相似文献
13.
14.
THE BALANCE BETWEEN SUPPLY AND DEMAND OF WATER RESOURCES AND THE WATER—SAVING POTENTIAL FOR AGRICULTURE IN THE HEXI CORRIDOR 总被引：5，自引：0，他引：5
The Hexi Corridor is an important base of agriculture development in Northwest China. According to recent statistics, there
are 65.94×108m3 of water resources available in the Hexi Corridor. At present, net consumption in development and utilization is 43.33×108m3. Water supply and demand reach a balance on the recent level of production, but loss of evaporation and evapotranspiration
is as much as 25.69×108m3. So net use efficiency of water resources is 59%. Based on analyzing balance between water and land considering ecological
environment at present, there exists the serious water shortage in the Shiyang River system where irrigation lands have overloaded.
There is a comparative balance between supply and demand of water resource in the Heihe River system; and the Sule River system
has some surplus water to extend irrigation land. Use of agriculture water accounts for 83.3% and ecological forest and grass
for 6.9%. The Hexi Corridor still has a great potential for water saving in agriculture production. Water-saving efficiency
of irrigation is about 10% by using such traditional technologies as furrow and border-dike irrigation and small check irrigation,
and water-saving with plastic film cover and techniques of advanced sprinkler and drip/micro irrigation etc. cansave more
than 60% of irrigated water. Incremental irrigation area for water-saving potential in the Hexi Corridor has been estimated
as 56% – 197% to original irrigation area. So the second water sources can be developed from water saving agriculture in the
Hexi Corridor under Development of the Western Part of China in large scale. This potential can be realized step by step through
developing the water-saving measures, improving the ecological condition of oasis agriculture, and optimizing allocation of
water resources in three river systems.
Foundation item: Under the auspices of the Key innovation Project Engineering of Chinese Academy of Sciences (KZcx-1-10-03)
Biography: GAO Qian-zhao (1942 –), male, a native of Changzhou, Jiangsu, Professor and supervisor of Ph. D students. His research
interests include hydrology and rational utilization of water resources in the arid zone. 相似文献
15.
泰安市西南25km处的大汶口盆地东部出露泰山南麓最大的上泉岩溶泉群。上泉泉域边界清晰,受断裂构造、地层岩性控制。泉域东部云亭山、南山一带丘陵区寒武-奥陶纪碳酸盐岩夹碎屑岩裸露地表,接受大气降水直接入渗补给,西部山前倾斜平原地带浅覆盖或半裸露,除接受大气降水下渗补给外,还接受南留河渗漏和胜利水库季节性放水农灌回渗水补给,地下水动态受补给作用影响明显。泉域多年平均大气降水补给资源量约190万m~3,南留河渗漏补给资源量约259万m~3,农灌回渗水补给资源量约52万m~3,合计约501万m~3,扣除上泉泉群排泄量34万m~3,工农业和生活用水开采量约222万m~3,剩余约245万m~3在向泉域下游径流中逐渐向上顶托越流排泄于第四系松散岩类孔隙含水层中。为保护上泉泉群景观资源,本着"先看后用"的原则,应禁止在泉群上游增采岩溶地下水,可在泉群下游隐伏寒武纪炒米店组灰岩、张夏组灰岩分布区适当布井,夺取部分径流排泄资源量对泉群喷涌不会产生大的影响。 相似文献
16.
本文以高青县引黄灌区为例，从灌区水资源利用量计算、水资源合理调配以及加强管理与节流三方面论述了灌区在水资源利用中应遵循的方法和原则。 相似文献
17.
I INTRODUCTIONNatllral environment and water transform in theworld have changed faster and faster under the effect ofhuman activities. The study on effect of human activities to hydrological processes, and its extent and tendency has been more and more important as one of theresearch projects of hydrology in the world (RAI et al.,1998, BASS et al., 1998, WANGet al.,, 1998; HILLet al., 1998; LIU, 1997). It became one of the mainresearch program of international Hydrological Decade(… 相似文献
18.
19.