浅论天山北麓水资源开发利用前景     

肖军 《新疆地质》1993,(4)

通过对天山北麓水资源供需情况分析,预测今后10年,该地区将出现严重缺水。建议各地区应合理调配地表水,充分开发利用地下水,并采取有效的工农业节水措施,以保障该区国民经济发展的用水需要。  相似文献   

内流河流域水资源利用对径流年际年内变化影响的分析——以塔里木河流域为例   总被引：10，自引：1，他引：9  

海米提  熊黑钢 《地理研究》2000,19(3):271-276

以塔里木河流域为例,探讨了干旱区内流河流域近40年来,由于人口增长、灌溉面积扩大、河流水资源引用程度日益增加等原因所引起的河流径流多年变化及年内变化等水文效应及其变化的原因。  相似文献   

内蒙古土地资源及其持续利用   总被引：6，自引：0，他引：6  

宝音  包玉海 《地理科学》2000,20(5):478-482

系统分析内蒙古土地资源的特点和土地利用结构特征,找出土地利用中存在的问题及原因,指出土地利用结构不够协调合理、土地利用结构区域差异十分明显,并阐述其原因。在此基础上着重阐明内蒙古土地资源持续利用的原则和实现土地资源持续利用的措施和途径。  相似文献   

西北地区水资源现状与可持续利用对策的探讨   总被引：4，自引：1，他引：4  

王恩鹏 《云南地理环境研究》2006,18(1):92-96

中国的水资源问题在西北地区尤为突出。西北地区生态环境脆弱，资源丰富，如何在发展经济的同时实现人与自然的和谐共处，已成为人们日益关心的话题。随着国家西部大开发战略的进一步推进，特别是实施西部大开发的近5年，切实采取有效措施以实现西部地区水资源的可持续利用，已经逐渐成为人们的共识。从分析西北地区水资源现状入手，分析西北地区水资源的特点，并据此提出西北地区水资源可持续利用对策：（1）加大地下水资源勘查力度，查清水资源储量；（2）综合利用，科学规划，加强水资源的合理配置与调控；（3）开源与节流并举，尤其要重视节流；（4）充分利用天然地下库容调蓄水资源；（5）完善相关法律和法规的建设，强化监督管理，加强和完善水资源法规建设，建立健全水资源管理体系。通过以上措施的实施将有利于解决西北地区水资源的严重匮缺问题。  相似文献   

人工矿床污染的防治与对策   总被引：2，自引：0，他引：2  

王亚平  王苏明  张喜友  刘伟 《岩矿测试》2000,19(3):180-184

通过对铜绿山某矿尾矿及废水的物质组分的分析研究 ,查明主要污染物是Cu、Fe、悬浮物和选矿残留的有机试剂 ;尾矿废水处理的初步研究表明 ,石灰、H2 SO4 、FeCl3、Al2 (SO4 ) 3 均可有效去除尾矿废水中的污染物质 ,从综合因素考虑 ,采用石灰处理效果最好 ,处理过的尾矿废水可以重复利用 ;在上述研究基础上 ,提出了尾矿及尾矿废水的污染防治对策和综合利用方案 ,通过综合利用可以从尾矿中回收近 1× 1 0 5t金属铜和大约 3× 1 0 6t金属铁 ,Co、Mn、Zn、Ag、Au、Re、W等金属也有一定综合利用价值。  相似文献   

江西德兴铜矿尾矿提取缉云母及综合利用的探讨     

田信普  李骏 《地质与勘探》2000,36(5):47-48

介绍了德兴铜矿尾矿的化学组成及粒度分布状况,对尾矿提取绢云母及综合利用进行了初步探讨。  相似文献   

Trends of water resource development and utilization in arid north-west China   总被引：12，自引：0，他引：12  

Q. Feng  G. D. Cheng  M. K. Masao 《Environmental Geology》2000,39(8):831-838

 From an analysis of the current water resources and their development and utilization in arid north-west China, the authors conclude the extent of channelled water accounts for only 56.0% of the total, exploitable surface-water resources of arid north-west China. The utilization ratio of canal systems is 42%, and farmland use is 0.8. When the ground and surface waters of river basins in the region are comprehensively developed, the channelled water will reach its climax, accounting for 80% of the total, exploitable surface-water resources, which would constitute a 91% increase over current levels in surface-water resource development. In the future, the utilization ratio of canal system as well as the utilization ratio of farmland water will reach 0.9 with the help of scientific and technological advancements. The channelled water is the same as the comprehensive development and utilization stages, but the total water use will be increased by 247×10⁸ m³, and will reach 756.8×10⁸ m³, accounting for 88.2% of the total, exploitable surface-water resources in arid north-west China. Also, the authors suggest that the scientific and technological measures to increase the water-use ratio include improving management, strengthening protection of water resources and the environment, and increasing studies of water saving techniques. Received: 11 January 1999 · Accepted: 6 July 1999  相似文献   

Oxygen Utilization and Organic Carbon Remineralization in the Upper Water Column of the Pacific Ocean     

Richard A. Feely  Christopher L. Sabine  Reiner Schlitzer  John L. Bullister  Sabine Mecking  Dana Greeley 《Journal of Oceanography》2004,60(1):45-52

As a part of the JGOFS synthesis and modeling project, researchers have been working to synthesize the WOCE/JGOFS/DOE/NOAA global CO₂ survey data to better understand carbon cycling processes in the oceans. Working with international investigators we have compiled a Pacific Ocean data set with over 35,000 unique samples analyzed for at least two carbon species, oxygen, nutrients, chlorofluorocarbon (CFC) tracers, and hydrographic parameters. We use these data here to estimate in-situ oxygen utilization rates (OUR) and organic carbon remineralization rates within the upper water column of the Pacific Ocean. OURs are derived from the observed apparent oxygen utilization (AOU) and the water age estimates based on CFCs in the upper water and natural radiocarbon in deep waters. The rates are generally highest just below the euphotic zone and decrease with depth to values that are much lower and nearly constant in water deeper than 1200 m. OURs ranged from about 0.02–10 μmol kg⁻¹yr⁻¹ in the upper water masses from about 100–1000 m, and averaged = 0.10 μmol kg⁻¹yr⁻¹ in deep waters below 1200 m. The OUR data can be used to directly estimate organic carbon remineralization rates using the C:O Redfield ratio given in Anderson and Sarmiento (1994). When these rates are integrated we obtain an estimate of 5.3 ± 1 Pg C yr⁻¹ for the remineralization of organic carbon in the upper water column of the Pacific Ocean. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Activity patterns, home-range size, and habitat utilization of Sarpa salpa (Teleostei: Sparidae) in the Mediterranean Sea   总被引：1，自引：0，他引：1  

Jadot  C.; Donnay  A.; Acolas  M.L.; Cornet  Y.; Begout Anras  M.L. 《ICES Journal of Marine Science》2006,63(1):128-139

  相似文献   

Blennies and Endolithic Bivalves: Differential Utilization of Shelter in Adriatic Blenniidae (Pisces: Teleostei)   总被引：3，自引：0，他引：3  

Kurt  Kotrschal 《Marine Ecology》1988,9(3):253-269

Abstract. The utilization of empty holes of endolithic bivalves (Gttsirocluwnu dubui by Bknnius chdmcitinus , and Litliophaga lithophaga by all other species) as shelters by egg-guarding males of nine species of Adriatic Blenniidae is compared. A wide spectrum of entrance sizes to these "standardized" shelters is used with the most frequent utilization ranging between 1(H) and 275 mm^: (11.2–18.8mm mean entrance diameters). As a trend within and between species, larger fish utilize holes with disproportionately wider entrances. There arc significant differences between species in the means of "fit" of the heads within the entrances: the heads of B. dulmaibuts, B. canaeve, B. adrialicus , and B. zvonimiri "fit" tightly into their entrances whereas the two large species, B.puvo and B. tentacularis , which only facultatively use holes of boring mussels for breeding, arc found in holes with "oversized" entrances. In most species mean shelter depth approximates mean body length. Species which tightly "fit" their entrances tend to stay longer when disturbed mechanically or chemically compared to those with only a loose "fit". The ecological and evolutionary significance of these patterns is discussed.  相似文献