检索结果-南通市图书馆

Land Use Change and Causes in the Xiangxi Catchment, Three Gorges Area Derived from Multispectral Data

Journal of Earth Science 2010年第6期21卷 846-855页

作者： Christoph Seeber Heike Hartmann 项伟 lorenz king Center for International Development and Environmental Research (ZEU) Justus Liebig University Giessen Department of Geography Geology and the Environment Slippery Rock University Three Gorges Research Center for Geo-hazard Ministry of Education China University of Geosciences Faculty of Engineering China University of Geosciences

The construction of the Three Gorges Dam on the Yangtze River has extensive impact on the ecosystems and the population of the Three Gorges Area （TGA）. Inundation and resettlement have induced far-reaching land use and land cover change （LUCC）. The areas that are affected by measures of resettlement are in a tense situation between the implementation of various governmental tasks addressing sustainable land use and water retention and the fulfilment of the population＇s economic needs, which primarily depend on agricultural production. Destabilization of slopes and soil erosion are immediate hazards induced by the impoundment. Farming is a very important source of income and has to persist on the one hand to assure the income of the rural population. On the other hand, the environment has to be protected from runoff, soil erosion and instabilities connected to relief, geology and hydraulic influences. In this study, supervised classifications are performed using Landsat-TM （1987 and 2007） and ASTER （2007） images. LUCC is assessed by post-classification change analysis. On the catchment scale, arable land has decreased significantly, while garden land （citrus orchards） and woodland have increased. LUCC mainly affects the area surrounding the reservoir （＂backwater＂） of the Xiangxi （香溪） River, driven by local resettlement, newly built infrastructure, relocation of land cultivation, and conversion of arable land to garden land. In the hinterland, LUCC occurs in form of abandonment of land cultivation as a consequence of the Grain-forGreen programme.

关键词： land use and land cover change Three Gorges Dam Yangtze River ecological

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

HYDROLOGIC/HYDRAULIC MODELLING AND FLOOD RISK ANALYSIS FOR THE WEST TIAOXI CATCHMENT, TAIHU LAKE REGION, CHINA

引用

Chinese Geographical Science 2000年第4期10卷 22-31页

作者： Xu, Peng-zhu Jiang, Tong king, lorenz

Located in the headwater upstream of the Taihu Lake region, which is a densely populated and economically developed area in China, the West Tiaoxi River catchment is a frequently food-hit area due to its nature and climatic characteristics. During the last several decades, more than ten catastrophic floods happened in this area, causing huge economic losses. Since 1990, due to the increasing property vulnerability to flood hazard, the disasters were even more serious than before, and economic losses increased year by year. Thus, there have great importance to study flood behaviors, flood risks and their consequences. In this paper the hydrologic/hydraulic modelling is presented firstly. It is the method to study the relationship between rainfall and runoff and the flood propagation process. Secondly, the author gives the summary of the current study methods for flood risk assessment. The West Tiaoxi River catchment has a long history of the construction of polders and hydraulic engineering. Most farmlands have been protected against floods. So the combination method has been used to obtain the real risk area. The results have been obtained by using this method, which, the authors think, will be used in disaster preparedness, property insurance etc.[PUBLICATION ABSTRACT]

关键词： Flood Map TAIHU LAKE REGION CHINA HYDROLOGIC/HYDRAULIC MODELLING AND FLOOD RISK ANALYSIS FOR THE WEST TIAOXI CATCHMENT

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Flood Risk Analysis and Flood Potential Losses Assessment

引用

Chinese Journal of Oceanology and Limnology 2003年第1期21卷 1-9页

作者：高俊峰 lorenz king 姜彤王润 Nanjing Institute of Geography and Limnology Academia Sinica Geographic Institute Geissen University Germany Nanjing Institute of Geography and Limnology Academia Sinica

The heavy floods in the Taihu Basin showed increasing trend in recent years. In this work, a typical area in the northern Taihu Basin was selected for flood risk analysis and potential flood losses assessment. Human activities have strong impact on the study area’s flood situation (as affected by the polders built, deforestation, population increase, urbanization, etc.), and have made water level higher, flood duration shorter, and flood peaks sharper. Five years of different flood return periods [(1970), 5 (1962), 10 (1987), 20 (1954), 50 (1991)] were used to calculate the potential flood risk area and its losses. The potential flood risk map, economic losses, and flood-impacted population were also calculated. The study’s main conclusions are: 1) Human activities have strongly changed the natural flood situation in the study area, increasing runoff and flooding; 2) The flood risk area is closely related with the precipitation center; 3) Polder construction has successfully protected land from flood, shortened the flood duration, and elevated water level in rivers outside the polders; 4) Economic and social development have caused flood losses to increase in recent years.

关键词： flood risk area potential flood losses polder

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

REVIEW ON GLOBAL NATURAL DISASTERS IN 2000

引用

Natural Disaster Reduction in China 2002年第3期 11-16页

作者： lorenz king Institute of Geography University of Giessen Germany

Globally, 2000 was an normal year in terms of economic loss from natural disasters. An analysis of the characters and distribution of major global natural disasters in the year 2000 is made and a discussion on the cau... 详细信息

关键词： global natural disasters review analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

2000年全球重大自然灾害概述

引用

自然灾害学报 2002年第1期11卷 15-19页

作者：姜彤王润 lorenz king 中国科学院南京地理与湖泊研究所江苏南京210008 联邦德国吉森大学地理研究所

２０００年是全球自然灾害经济损失较为一般的年份。根据收集到的全球自然灾害记录的数据，客观地对全球主要自然灾害的特征和分布特点进行了分析，并对其成因进行了探讨．

关键词：全球自然灾害回顾评析 2000年天气气候

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

评价湖泊富营养化的一个综合模型(英文)

引用

应用生态学报 2002年第12期13卷 1674-1678页

作者：蔡庆华刘建康 lorenz king 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室吉森大学地理研究所

湖泊富营养化的评价 ,即确定水体的状态属性 ,实际上是一个将定性问题定量化的多变量的综合决策过程 ,因此 ,对湖泊的富营养化程度进行评价应以综合评价为主 .在综述国内外若干综合评价方法的基础上 ,指出营养状态指数 (TSI)法应可作为... 详细信息

湖泊富营养化的评价 ,即确定水体的状态属性 ,实际上是一个将定性问题定量化的多变量的综合决策过程 ,因此 ,对湖泊的富营养化程度进行评价应以综合评价为主 .在综述国内外若干综合评价方法的基础上 ,指出营养状态指数 (TSI)法应可作为湖泊富营养化评价的主要方法 ,因其可对湖泊的营养状态进行连续的数值化分级 ,从而为富营养化机理的定量研究提供坚实基础 .采用层次分析 (AHP)法确定综合评价指标中的权重分配 ,构建一综合评价模型 :TSI =W (Chla)×TSI(Chla) +W (Sd)×TSI(Sd) +W (TP)×TSI(TP)或TSIM=W (Chla)×TSIM(Chla) +W (Sd)×TSIM(Sd) +W (TP)×TSIM(TP) .此外 ,文中简要讨论了综合评价与其他统计方法如聚类分析的关系 .

关键词：评价湖泊富营养化综合模型营养状态指数层次分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

太湖流域北部潜在洪涝风险区分析及影响评估

引用

自然灾害学报 2002年第4期11卷 37-41页

作者：高俊峰 lorenz king 姜彤王润中国科学院南京地理与湖泊研究所吉森大学地理研究所

太湖流域历来遭受严重的洪涝灾害,并且近年来有不断加重的趋势。本文选择太湖流域北部的无锡市作为典型研究地区,研究其洪涝的危险性并进行潜在损失评估。人类活动,包括修筑圩区、森林破坏、人口增长、城市化等,对这个地区的洪涝形势有... 详细信息

太湖流域历来遭受严重的洪涝灾害,并且近年来有不断加重的趋势。本文选择太湖流域北部的无锡市作为典型研究地区,研究其洪涝的危险性并进行潜在损失评估。人类活动,包括修筑圩区、森林破坏、人口增长、城市化等,对这个地区的洪涝形势有较大的影响;自然条件的变化使河道水位升高,洪涝历时缩短,洪峰增高。本文选择不同回归年(2,5,10,20,50年),结合地理信息系统分析模型,计算了潜在洪涝危险区域和洪涝损失,主要结论为:(1)人类活动已经改变了自然的洪涝形势,增大了汇流和洪涝;(2)洪涝危险区与降雨中心有关;(3)筑圩成功地保护了圩内的土地,缩短了洪涝历时,增高了圩外河道的洪涝水位;(4)经济发展使洪涝损失增加。

关键词：太湖流域洪涝危险区潜在洪涝损失圩地理信息系统人类活动

来源：

维普期刊数据库

同方期刊数据库评论