版纳勐养保护区鸟类及人为影响分析   总被引：1，自引：0，他引：1  

王直军  贾知行 《云南地理环境研究》1994,6(1):78-83

切实保护和利用好西双版纳现存热带森林，是急需处理的现实问题。本文通过勐养自然保护区鸟类调查结果，揭示了西双版纳保护区管理现状。多数地区实际上未管理起来，林区居民仍滥用自然资源，对鸟类的猎捕从未停止，有的地方颇为严重；从生物多样性着眼，环境质量在下降。现已管理起来的三岔河保护区，尽管旅游开放后尚存许多问题亟待探索和改进，但鸟类保护状况已明显改善，说明自然保护区旅游在科学管理下才是可行的。就此，本文分析、评价了勐养保护区鸟类受人为影响情况，对自然保护区管理工作提出建议。  相似文献   

坝上草地旅游业的效益及对脆弱生态环境的影响—以大滩地区为例   总被引：10，自引：0，他引：10  

赵雪 《中国沙漠》1994,14(4):86-91

坝上具有发展草地旅游业的景观资源、气候、区位等优势。开发草地旅游可对地方农村经济起到多方面的带动作用，但如布局不当和管理不严，会对当地脆弱的生态环境带来破坏性影响，产生新的环境问题。因而应对坝上草地旅游开发进行统一的科学规划、监测和管理。  相似文献   

Case histories of sand search in the Niger Delta     

T.?K.?S.?AbamEmail author 《Environmental Geology》2004,46(2):165-172

This paper discusses the imperatives of sand search and describes two case histories of sand search in the Niger Delta. These case histories highlight the project cycle of sand search operations and circumstances in which environmental peculiarities can influence procedures and strategies. Field and laboratory procedures emphasise the applications of particle-size distribution and compaction tests to field construction control. The need to integrate mitigative measures of potential impacts into the planning and execution of projects has been emphasised. Some environmental consequences of sand dredging have also been highlighted.  相似文献   

河南信阳茶叶资源环境优势及发展   总被引：4，自引：0，他引：4  

袁国强  李培玉 《山地学报》2004,22(6):772-775

信阳茶叶是河南省南部大别-桐柏山区的重要经济作物资源之一。该区域地处北亚热带，气候温暖湿润，生态环境复杂多样，植物资源丰富，是河南的鱼米之乡。气候条件独特，利于优质茶叶生长。因此，虽然以信阳毛尖为代表的信阳茶区茶叶面积小，茶叶总产量少，但产品质量上乘，深受茶叶消费者的喜爱，是全国名优绿茶重要产区。依据信阳茶区茶叶资源环境优势，提出进行名优绿色无公害茶产品的开发；组织茶叶产业化发展；加强信阳茶叶生产的标准化研究推广工作和加强对外经济技术联系协作，为河南省信阳茶叶可持续发展提供科学依据。  相似文献   

Landslides in Sado Island of Japan: Part I. Case studies, monitoring techniques and environmental considerations   总被引：1，自引：0，他引：1  

Lulseged Ayalew  Hiromitsu Yamagishi  Hideaki Marui  Takami Kanno 《Engineering Geology》2005,81(4):419-431

A sufficient knowledge on the kinematics and development of landslides helps to adopt proper measures that can be used to protect slopes and the environment in general. This can be achieved by adequate monitoring programs. This paper presents the findings of intensive monitoring activities carried out on Shiidomari and Katanoo landslides found in Sado Island of Japan. More than one year of observation of the two landslides allowed defining some peculiar futures of their kinematics and style of development. The problem of slope instability in the two areas is generally accredited to various factors. But, both landslides were triggered by heavy rainfalls and snowmelt. Because of the outline of the area and the presence of relict topographic features, the Shiidomari landslide is considered to be a large-scale reactivation of old slope failures. The Katanoo landslide is, however, a first-time case. Geophysical investigations and drilling activities in Shiidomari indicated the presence of two slip planes. The deepest (80–100 m) of these is controlled by existing lineaments. Monitoring data suggests that the body of the landslide has subsided as much as 1.16 m just below the main scarp, but a centimeter in the central region. The toe sector also experienced a significant amount of subsidence, but this was counter-balanced by an uplift on the opposite side of the landslide. Hence, the landslide seems not any more active along the deepest slip surface, although it may extend upward and define a series of shallow shear planes around the crown. In the case of Katanoo, the landform characteristics, differential weathering, the road cut and groundwater fluctuations appeared to contribute much to determine the exact location of the landslide. Extensional cracks that preceded the landslide can be related to heavy rainfalls and the cold and warm cycles thereafter. Subsurface investigations and monitoring works indicated that the landslide has two slide blocks with different slip planes. During the observation period, the upper part of the landslide responded more effectively to rainfall and snowmelt than the middle and lower sections. The corresponding movements, however, appeared to settle about three months after failure. There were also little strain transmissions in boreholes and no significant change in the characteristics of the landslide. The kinematics of deformation of many of the slopes in Sado Island resembles that of Shiidomari landslide. But mass movements along highways and mountain roads are usually similar to Katanoo. Landslides of the type like Shiidomari may not show sudden and drastic failures, but are usually long lasting and can reactivate repeatedly along new, shallow shear planes. Monitoring works and long-term supervisions in these types of landslides are useful to identify impending failures and take the right measures before they brought about large-scale destruction to the environment.  相似文献   

浙江田村沸石矿宕口综合治理介绍     

林继红  李思谕 《江苏地质》2006,30(2):158-160

废弃矿山治理是目前政府十分关注的问题。介绍了田村沸石矿宕口环境治理和生态恢复工程,通过喷播复绿方案及实施,消除了边坡发生地质灾害的可能性,使景区的环境得到了一定的恢复,对其他地方的宕口整治有借鉴作用。  相似文献   

GIS在环境质量管理中应用的探讨   总被引：1，自引：0，他引：1  

李婵娟  李维民 《国土资源信息化》2006,(5):35-37

利用有效的辅助决策支持工具GIS,对我国环境质量管理应用系统进行设计和开发,已成为当前环境规划与管理领域的一项重要任务。GIS在国内外环境质量管理中的应用有大气污染监测与管理、环境地理信息系统、环境管理决策支持系统等。笔者介绍了环境质量管理GIS研究开发的基本思路与方法,本文从环境质量管理的系统特性、功能需求、设计方法等方面阐述GIS总体设计。皆在为从事环境质量管理方面的工作人员提供一些理论依据。  相似文献   

江都市土壤重金属分布特征及污染评价     

王高  华明  郑俊  朱佰万 《江苏地质》2006,30(4):294-298

江都市土壤重金属含量分布及污染现状评价结果显示,江都市土壤环境质量总体良好,但局部地区土壤污染严重,其中通扬运河以北地区土壤环境质量优于通扬运河以南地区。土壤中镉、汞、锌含量空间分布不均匀,局部土壤含量超过国家土壤二级标准,由点源污染所致,其中镉、汞为江都市土壤主要致污染因子,导致局部土壤严重污染。建议对不同污染程度土壤土地采取不同利用方式,需进行合理调整规划。  相似文献   

城市发展与遥感技术应用——重庆市遥感综合研究成果概述   总被引：6，自引：2，他引：4  

张振德  肖继春  杨昌明  肖挺 《国土资源遥感》1998,9(1):7-15

应用遥感技术开展城市国土资源、生态环境、城市建设及规划等领域的调查研究,这是适应现代城市快速发展的需要而开展的一项工作。1995年12月重庆市完成了遥感综合研究工作,所获取的大量调查数据、图像、图件和文字报告等资料,对重庆市的国土开发整治、城市管理、建设规划制定以及环境治理等方面均起到了重要作用。本文以该市遥感综合调查为例,介绍遥感技术在城市综合调查研究中的作用和城市主管部门对遥感综合调查研究成果的应用情况及效果。目的是促进遥感这门高新技术在更多的城市得到广泛应用。  相似文献   

Interaction of rock and atmosphere: patinas on Mediterranean monuments   总被引：2，自引：0，他引：2  

M. Garcia-Vallès  M. Vendrell-Saz  J. Molera  F. Blazquez 《Environmental Geology》1998,36(1-2):137-149

 This paper analyzes – chemically, mineralogically, and petrolographically – the patinas developed on several Mediterranean monuments made with different stones (siliceous and carbonatic) in order to establish their origin and their evolution under the present environmental conditions, and to evaluate the environmental parameters controling their development. Most of the patinas show a common sequence of layers, which, from the outer to the inner zone, are: (1) present bioactivity and/or biological remains, (2) gypsum-rich patina, and (3) calcitic brown to orange patina. Each one may exhibit different fabrics (from micritic to stromatolitic) and may be more or less continuous and homogeneous. The main mineral components are calcite and gypsum, but Ca-oxalates and Ca-phosphates have also been found associated to biological structures, as well as quartz and clays. The different fabrics and textures have been interpreted as consequence of changes in the environmental conditions which seem to be related to the biological activity, facilitating the growth of different organisms and leading to the development of a deposit with distinct characteristics (fabric, texture, porosity, etc.). The gypsum-rich patina has been interpreted as a sulphation of the underlying calcitic layer by the action of atmospheric pollutants or as dry or wet deposition from the atmospheric dust. The mineralogy and texture of the patina is independent of the nature of the underlying rock and only in few cases a micritization process has been observed as interaction between patina and rock. Recently, the penetration of endolithic microflora produced drillings and the development of a fissuration system parallel to the surface, and thus the detachment of the crust from the rock and even flackening of the rock itself has been observed. Consequently, under the present climatic conditions in the Mediterranean basin, erosion is a more active process than deposition, and the crusts and patinas show a tendency to disappear from the surface of the monuments. Received: 3 November 1996 · Accepted: 10 September 1997  相似文献