遥感技术在鲁南地区水资源综合开发利用中的应用   总被引：2，自引：1，他引：1  

王召海 《国土资源遥感》2000,11(1):19-23

以水量平衡理论为依据,采用不同时相的TM图像数据及多元信息复合技术对鲁南地区沂源、沂水、沂南三县(简称“三沂”)的地下水资源、地表水拦蓄条件进行调查分析,在此基础上,提出了区域水资源综合开发利用配置方案。  相似文献   

保山井水位异常的数值模拟   总被引：2，自引：0，他引：2       下载免费PDF全文

尹京苑  赵利飞 《地震工程学报》2000,22(4):397-401

利用1995年7月12日云南孟连Ms7.3地震和1996年2月3日云南丽江Ms7．0地震前保山井水位异常变化的原始资料,并根据介质体膨胀变化率和水位变化的耦合关系式,用有限差分法模拟了保山井水位的变化情况。通过拟合实际观测曲线,得出观测井附近含水层内平均应力变化率的演化情况。  相似文献   

数值分析预报产品的拼合图制作系统     

姜荣  高煜中 《黑龙江气象》2000,(4):6-8

设计了数值分析预报产品的拼合图制作系统。该系统是在原地面传输网络上的格点资料绘图系统基础上制作的,对原系统进行了一系列改进。属于ＭＩＣＡＰＳ系统的二次开发内容之一。  相似文献   

T63L16谱模式水汽初始场的处理和试验     

季仲贞  王斌 《气候与环境研究》2000,5(2):141-144

在T63L16谱模式中,初始输入的水汽场,经展谱后,垂直各层一般出现2％～8％的负水汽点。为了克服这一负水汽现象,我们采用了“逐步循环订正法”对初值进行了一些特别处理。经实例计算表明,其效果明显,不仅负水汽现象得以克服,而且对各层水汽场的水平分布不会带来明显的变化。  相似文献   

Catastrophic and dangerous inflows to salt mines in Poland as related to the origin of water determined by isotope methods   总被引：2，自引：0，他引：2  

A. Zuber  J. Grabczak  A. Garlicki 《Environmental Geology》2000,39(3-4):299-311

 Tritium, ¹⁴C, δ¹³C, δ¹⁸O and δD measurements indicated as early as 1973 the existence of inflows of modern meteoric water to the Wapno salt mine in a Zechstein diapir. In spite of these early warnings, the continuation of improper exploitation led, in 1977, to sudden flooding of the mine followed by catastrophic land subsidence. The lesson learned from that catastrophe, as well as the results of isotope investigations performed in the Inowrocław salt mine, led to the decision to flood the mine artificially in order to avoid a similar land subsidence. The Kłodawa mine was not regarded to be in danger of flooding due to a thick clay cap. In fact, a large number of usually short-lasting water occurrences had the isotopic composition characteristic for evaporated ocean water. However, since 1956 an inflow has existed with δ¹⁸O and δD values close to that of pre-Quaternary saline waters and brines in the Mesozoic formations adjacent to the diapir. Two other inflows have recently occurred with the initial δ¹⁸O and δD values of modern waters. As a consequence, the mine is regarded to be in danger, and the exploitation of salt in the areas of inflows has been stopped. The Wieliczka mine, southern Poland, exploits Miocene salts overthrusted together with the Carpathian flysch from the south. The most dangerous and catastrophic inflows were caused by human errors. Isotope data show the water to be of glacial or Holocene age stored in Tertiary, slightly cemented rocks of low permeability, which neighbor the mine from the north. Owing to specific geology, the mine has survived for a long time, in spite of relatively large and long-lasting inflows. However, its existence is in permanent danger. Received: 7 March 1997 · Accepted: 17 November 1998  相似文献   

Water contamination and remedial measures at the Troya abandoned Pb-Zn mine (The Basque Country, Northern Spain)   总被引：1，自引：0，他引：1  

V. Iribar  F. Izco  P. Tames  I. Antigüedad  A. da Silva 《Environmental Geology》2000,39(7):800-806

 This article describes a case of contamination of a karstic aquifer by abandoning an underground mine exploiting sulphide ore body. To exploit the ore, the aquifer was drained and the water level declined about 230 m, drying up the spring that had drained the aquifer up to that moment. When the mining activity ceased, the piezometric level recovered and contaminated water began to flow out from a mine adit. The water is high in sulphates and dissolved Fe, although the pH is neutral. When this water reached the nearby creek, the fish population was eliminated, principally due to the presence of toxic metals and the precipitation of Fe hydroxides. The contamination originated in an area of the partially flooded mine rooms where the ore is in contact with both air and water. The acidity generated by pyrite oxidation is neutralized by calcite dissolution. Presently, the mine water is diverted to the old tailings pond which functions as an aerobic wetland. This action has allowed the fish population in the creek to be restored. Received: 20 January 1999 · Accepted: 15 March 1999  相似文献   

Environmental impact assessment on water quality deterioration caused by the decreased Ganges outflow and saline water intrusion in south-western Bangladesh   总被引：3，自引：0，他引：3  

Md. Mokhlesur Rahman  Muhammad Qumrul Hassan  Mohammad Saiful Islam  S. Z. K. M. Shamsad 《Environmental Geology》2000,40(1-2):31-40

 This paper deals with an environmental impact assessment of low water flow in the river Ganges during a dry period at the Khulna and Mongla port areas in south-western Bangladesh. Large-scale surface water withdrawal in India after commissioning the Farakka Barrage causes a drastic fall in the Ganges low-flow condition within the Bangladesh territory during every dry period. The average lowest discharge in the Ganges is 552 m³/s, which is about 73% less than that in the pre-Farakka time. This has caused the deterioration of both surface and groundwater quality of the study area. Salinity is the principal cause of water quality degradation in the area. Present observation shows that the surface water of the area is sulphate-chloride dominated, which signifies high salinity whereas the groundwater is categorized as of medium to high salinity. To maintain the Rupsa River's maximum salinity below 1000 μS/cm the discharge in the Ganges should be ∼1500 m³/s, whereas that at Garai basin is ∼10 m³/s. If this present situation continues it will be a crippling blow to the environment of the area in the long term. An integrated multidisciplinary approach to hydrogeological research is urgently required to salvage the area from further deterioration. Received: 9 August 1999 · Accepted: 8 March 2000  相似文献   

官厅水库近三十年的水质演变时序特征   总被引：17，自引：0，他引：17  

梁涛  王浩  丁士明  薛金凤  蔡春霞  张秀梅 《地理科学进展》2003,22(1):38-44

基于过去的研究成果,综述了官厅水库近三十年来的水质演变过程,分阶段探讨了官厅水库水污染的来源和特征。与此同时,从污染物的角度探讨了官厅水库典型污染物的时空变化规律。研究结果表明,官厅水库的水质演变先后经历了四个阶段,依次为1972～1975年以有机毒物和重金属污染为特征的水体污染,1981～1992年以有机污染为主体的水体再污染,1992～1995年增加了大肠杆菌污染的水体复合污染,以及1996年至今以氮磷污染为明显特征的水体有机复合污染。从主要污染物的时间变化上看,库区COD和主要重金属含量均在缓慢上升,挥发酚的含量呈现波动趋势,氨氮和总磷的含量持续大幅度上升。污染物在库区的空间分布规律相似,入库处污染物浓度明显高于出库处的污染物浓度。  相似文献   

农业生态地质调查初探——以辽宁鞍山南部地区为例   总被引：1，自引：0，他引：1  

温守钦  刘洪涛  任群智  朱恩静  金成洙  王学宓 《地质与资源》2004,13(3):156-158,191

以鞍山南部地区农业生态地质调查为例,阐述了通过测定主要元素在土壤中的分布,综合评价农业生态地质背景,从而研究土地种植适宜性及土壤环境安全性和治理对策,进而讨论在辽宁省开展农业生态地质调查研究的主要内容及意义.此外,对特种经济作物南果梨专项调查表明,土壤中铁、锰、镁、钾、钴元素含量决定了南果梨的独特品质,以变辉长岩或片岩和花岗岩混合岩为成土母岩地区是南果梨生长的最佳区域.  相似文献   

黄河一级支流水土保持“3S”分析应用   总被引：2，自引：0，他引：2  

张培宏  罗万勤 《地球信息科学学报》2003,5(1):113-115

改善黄河流域生态环境是推动西部大开发的有力保证。本文以黄河一级支流为单元,以秃尾河、皇甫川和窟野河为重点研究对象,介绍了如何利用GPS、RS和GIS相结合的技术,动态监测黄河流域水土流失情况,为黄河流域环境治理提供科学依据。  相似文献