城市化进程中的战略环境评价(SEA)初探   总被引：27，自引：8，他引：27  

车秀珍  尚金城  陈冲 《地理科学》2001,6(6):554-557

城市化是中国现代化进程中面临的一个重要问题。21世纪初期，中国城市化发展将进入快速发展的关键时期，开展城市化进程中的SEA，即在城市化决策的各个层次前瞻性地考虑政策、规划、计划及其替代方案的环境影响，有助于提高决策质量和实施可持续发展。文章对城市化进程中SEA的概念、对象、评价目标、评估指标体系和评价方法进行了初步探讨，并提出城市化进程中SEA的基本程序。  相似文献   

Case studies of ERS-1 altimeter data applicating in China Sea     

杨学联  季晓阳  黄润恒  凌铁军 《海洋预报》2001,18(Z1)

1 IwrRODUcrIONAn initial field of wave height in a computing domain is needed fOr integration ofnumerical wave model. Because real time. observation ocean data are scarce, now most ofinitial fields of ocean wave is produced by either reckoning wind fields or preceding 24hour prediction results. It is possible to form an initiaI field of ocean wave along with the..increasing satellite data, ship report and buoy data. Some of research works have beendone abroad (Janssen et a1, l989; LionelI…  相似文献   

Numerical Study of Oil Pollution on Sea Waters     

Geng Zhaoquan  Ni Yongqiang  Zhou Anguo Senior Engineer  Zhejiang Provincial Institute of Estuarine  Coastal Engineering Research  Hangzhou Engineer  Zhejiang Provincial Institute of Estuarine  Coastal Engineering Research  Hangzhou Engineer  Zhejiang Institute of Environmental Protection Science  Hangzhou 《中国海洋工程》1992,(1)

This paper adopted an upstream FEM of 2-D unsteady flow to calculate the tidal flow in Zhoushan sea area. Based on the verification of the tidal current and environmental situation, the effects of the oily waste discharged from the oil berths on water quality have been calculated with a similar method. The isodilutions of oil pollutant are drawn from different sewage discharges. The moving loci of the slick centrepoint of oil spill have been calculated. The spreading area of the oil spill has also been forecasted. The results indicate that the set of models can predict the transport of oil spill in the sea area with reasonable accuracy.  相似文献   

常州市区逆温特征及其对大气污染的影响   总被引：1，自引：1，他引：0  

程克明  孙学金 《南京气象学院学报》1992,15(2):119-125

  相似文献   

风化作用与金属污染讨论   总被引：3，自引：4，他引：3  

张辉 《矿物岩石地球化学通报》2003,22(2):149-151

讨论了自然条件下岩石、矿物等化合物化学反应机理及主要制约因素，分析了自然界金属元素向环境释放的基本机制，强调水在金属元素从其原始载体——矿物、岩石进入环境过程中的作用。结合现实环境问题探讨和归纳了金属污染的自然成因和机制。  相似文献   

黄土高原土壤裸露与景观格局关系——以延安市宝塔区为例          下载免费PDF全文

张小飞  王仰麟  李正国  李卫峰 《第四纪研究》2004,24(6):709-715

土壤裸露是水土流失具体的空间表现,同时又是导致进一步水土流失的重要因素。由人类和自然相互作用下形成的景观格局对土壤裸露具有深刻的影响。为深入探讨二者间的内部联系,文章选定位于黄土高原的延安市宝塔区为研究区,分别就景观格局的类型组成和空间结构,分析其与土壤裸露的关系。研究结果可知人为活动强度较大的区域土壤裸露程度较高,在景观类型上,表现出滩地、农村居民点、其他建设用地、低覆盖度草地及山区旱地等景观类型的土壤裸露值较高,另外,从景观组成来看,农牧组成为主的流域土壤裸露值明显高于其他流域;通过景观空间结构与土壤裸露的关系分析,可知个体单元型态、空间构型以及整体多样性等景观空间结构特征,均对土壤裸露程度具有不同大小的指示意义,其中又以景观聚集度及平均斑块面积与土壤裸露程度有强烈负相关。  相似文献   

Removal of Cu（ Ⅱ） from Wastewater Using Acidified Sewage Sludge Ash     

GanYiqun WangYanxin ZhangCongjun 《中国地质大学学报(英文版)》2004,15(3):290-294

Sewage sludge ash (SSA), the waste generated in sewage sludge incineration, was obtained from Wuhan Sewage Treatment Plant and used as a low-cost sorbent for removing Cu (Ⅱ) from wastewaters. The sorbent was first modified with 5 % sulfuric acid to increase its sorption capacity. The specific surface area, porosity, cation-exchange capacity (CEC) and pHzzc of the sorbent were measured. Batch experiments were made to study the effect of contact time, solution pH value and temperature on sorption. Both Langmuir and Freundlich models well described the Cu (Ⅱ) sorption process,with correlation coefficient (R2 ) values of 0. 993 4 and 0.9899 respectively. And the sorption process follows the Lagergren first order kinetic model. The equilibrium sorption capacity of acidified SSA to Cu(Ⅱ) is estimated to be 7.78 mg/g under optimal conditions.  相似文献   

First Occurrence of M andarinoite in China   总被引：6，自引：0，他引：6  

Harvey E. BELKIN National Center  U.S. Geological Survey  Reston  VA -  USAE-mail: hbelkin@usgs.gov ZHENG Baoshan  ZHU JianmingState Key Laboratory of Environmental Geochemistry  Institute of Geochemistry  Chinese Academy of Sciences  Guiyang  Guizhou  China 《《地质学报》英文版》2003,77(2):169-172

This report describes the first occurrence of the rare mineral mandarinoite (Fe3+2 Se3Og · 6H2O) in China. It occurs in the Lower Permian Maokou Formation carbonaceous shale in Yutangba Village east of Enshi City in southwestern Hubei Province. The shale is selenium-rich and contains native selenium, V-Mo-Cr-bearing iron oxide, clay and quartz. Weathering of the selenium in the bedrock under moderate to high redox conditions in the presence of ferric iron has formed mandarinoite.  相似文献   

Variations of δ~(18)O in Precipitation along Vapor Transport Paths   总被引：1，自引：0，他引：1  

章新平  刘晶淼  田立德  何元庆  姚檀栋 《大气科学进展》2004,(4)

Three sampling cross sections along the south path starting from the Tropics through the vapor passage in the Yunnan-Guizhou Plateau to the middle-low reaches of the Yangtze River, the north path from West China, via North China, to Japan under the westerlies, and the plateau path from South Asia over the Himalayas to the northern Tibetan Plateau, are set up, based on the IAEA (International Atomic Energy Agency)/WMO global survey network and sampling sites on the Tibetan Plateau. The variations, and the relationship with precipitation and temperature, of the δ18 O in precipitation along the three cross sections are analyzed and compared. Along the south path, the seasonal differences of mean δ18O in precipitation are small at the stations located in the Tropics, but increase markedly from Bangkok towards the north, with the δ18O in the rainy season smaller than in,the dry season. The δ18O values in precipitation fluctuate on the whole, which shows that there are different vapor sources. Along the n  相似文献   

退役尾矿坝的环境安全问题分析     

郭敏丽  王金生 《水文地质工程地质》2004,31(2):50-53

退役后的尾矿坝是否安全,主要决定于坝体和坝基的渗漏、坝体土的渗透变形和坝体的稳定性。本文主要从这三个方面出发,以东北地区754矿尾矿坝为例,对退役尾矿坝的环境安全问题进行了分析。结果表明,在对退役尾矿坝的环境安全问题进行分析时,渗流计算可不考虑正常情况下的渗流问题。鉴于尾矿坝与普通坝的不同,坝体稳定性分析的计算方案应增加地震叠加洪水时的情况,在对一些组成复杂含有夹层的土层进行参数分区时,应遵循"就粗"原则。  相似文献