Livelihood strategy change and land use change —Case of Danzam Village in upper Dadu River watershed, Tibetan Plateau of China   总被引：2，自引：1，他引：1  

Jianzhong Yan  Yili Zhang  Liping Zhang  Yingying Wu 《中国地理科学(英文版)》2009,19(3):231-240

Land use change in rural China since the 1980s, induced by institution reforms, urbanization, industrialization and population increase, has received more attention. However, case studies on how institution reforms affect farmers’ livelihood strategies and drive land use change are scarce. By means of cropland plots investigations and interviews with farmers, this study examines livelihood strategy change and land use change in Danzam Village of Jinchuan County in the upper Dadu River watershed, eastern Tibetan Plateau, China. The results show that, during the collective system period, as surplus labor forces could not be transferred to the secondary and tertiary industries, they had to choose agricultural involution as their livelihood strategy, then the farmers had to produce more grains by land reclamation, increasing multiple cropping index, improving input of labor, fertilizer, pesticide and adopting advanced agricultural techniques. During the household responsibility system period, as labors being transferred to the secondary and tertiary industries, farmers chose livelihood diversification strategy. Therefore, labor input to grain planting was greatly reduced, which drove the transformation of grain to horticulture, vegetable or wasteland and decrease of multiple cropping index. This study provides a new insight into understanding linkages among institution reforms, livelihood strategy of smallholders and land use change in rural China. Foundation item: Under the auspices of National Natural Science Foundation of China (No. 40601006, 40471009), National Basic Research Program of China (No. 2005CB422006)  相似文献   

寻找黑金:洞庭湖重启石油勘探     

刘俊 《国土资源导刊(湖南)》2009,6(6):30-34

憧憬未来的几十年或者上百年,湖南能否实现油气产量为"0"的突破.尚是一个未知数,但并不妨碍一代又一代的勘探技术人员继续追梦.  相似文献   

市州     

《国土资源导刊(湖南)》2009,(11):10-11

11月3日,国土资源部、财政部组织专家对环洞庭湖基本农田建设重大工程技术成果资料进行了评审。  相似文献   

湖南水资源保卫战     

陈雪骅  秦楼 《国土资源导刊(湖南)》2009,6(11):36-39

哪怕放在世界地图的版块中,湖南给世人的印象也绝对是一个水资源丰富的所在。其名称的由来——＂位于长江中游以南,洞庭湖以南＂的地理位置,天生就与水资源密不可分。但恰恰是这样一个看似水资源丰富的省份,近年来却频现水荒。  相似文献   

Micromorphology and quality attributes of the loess derived soils affected by land use change: A case study in Ghapan watershed, Northern Iran     

Farhad Khormali  Somaye Shamsi 《山地科学学报》2009,6(2):197-204

In order to study the effects of different land vegetative covers on soil quality attributes, a loess hill slope was selected in eastern Golestan Province, Ghapan watershed, Iran. Four profiles in four land uses, including Quercus natural forest; Pinus artificial forest; Cupressus artificial forest and a cultivated land, were studied. Results showed that MWD was significantly different in the studied land uses, and it varied between 1.6 mm in Quercus natural forest and o.31 mm in cultivated land use. The lowest CEC, microbial respiration rate and organic carbon were 28.4 cmol·kg^1, 177 μgCO2·g^-1·day^-1 and 1.32 % found in cultivated land use, respectively. The organic matter was considerably higher content in the forest areas than that of cultivated land use. The studies on soil profile development revealed that the natural forest soils were highly developed. The soils of the Quercus natural forest were classified as Calcic Haploxeralfs with a well developed argillie horizon unlike the cultivated soils which showed the minimum development and classified as Typic Xerorthents. The soils of the artificial forests had both mollic epipedons and were classified as Typic Calcixerolls with moderate profile development. Micromorphological studies revealed that argillic horizons had speckled and partly crystallitic b-fabric in the natural forest indicating the high landscape stability. In contrast, the crystallitic b-fabric of other land uses shows the absence of enough leaching of carbonate and the subsequent migration of clay particles indicating the unstable conditions and high soil erosion. Intense erosion of the surface horizons of cultivated land use has resulted in the outcropping of the subsurface carbonate rich horizons preventing soil development.  相似文献   

环洞庭赏石文化家,最早出现在8000年前     

童潜明 《国土资源导刊(湖南)》2009,6(12):86-87

洞庭湖的观赏石资源必然会造就一批赏石文化家,也必然会产生永存的精神文明和不可估价的经济价值.  相似文献   

数字流域中的WebGIS设计与实现   总被引：1，自引：0，他引：1  

季芳  张万昌 《测绘信息与工程》2009,34(2):25-27

研究了基于WebGIS体系的数字流域系统的建设,提出了以渭河流域为试点的数字流域建设的设计及实现方案,实现了该流域信息的可视化及地图交互操作。  相似文献   

明代洛河流域洪涝灾害序列分形结构研究   总被引：1，自引：0，他引：1  

龙腾文  赵景波 《海洋地质与第四纪地质》2008,28(3)

通过对历史文献资料的整理和统计分析,对明代1368—1644年的277年间洛河流域的洪涝灾害进行了研究。研究得出,洛河流域在这一时段内共发生了56次洪涝灾害,平均约4.95年出现1次;其中特大涝灾3次,大涝灾12次,中度涝灾16次,轻度涝灾25次。洛河流域明代洪涝灾害可分为4个大的阶段,其中1368—1429年和1490—1539年两个阶段是洪涝灾害少发阶段,1430—1489年和1540—1644年两个阶段是洪涝灾害多发阶段。洪涝灾害的自相似特征揭示了灾害的分形性质。研究发现,明代洛河流域的各级洪涝灾害的分堆值都低于0.2,且无标度区相同,这表明了此时段洪涝灾害的长周期分量较强,且存在灾害的集中性。  相似文献   

Spatial Variability of Mass Movements in the Satluj Valley,Himachal Pradesh during 1990～2006     

Vikram Gupta  M. P. Sah 《山地科学学报》2008,5(1):38-51

Satluj Valley is known to have a history of landslides and related mass movement activities since the geological times. Geological and geomorphological settings combined with anthropogenic activities constitute a propensity towards slope failure. During the last two decades,the area witnessed substantial increase in athropogenic pressure,mainly due to the exploitation of hydropower potential,changing landuse pattern and population growth. In addition,a shift of the climatic patterns in the form of larger area falling under the influence of rains was observed. These natural as well as anthropogenic changes in the area have resulted in increased spatial coverage of landslide in the area. This paper documents these changes during 1990～2006.  相似文献   

东江流域雨水集中期气候特征及2006年降水成因分析     

禹伟  戴泽军  邓晓春  郭海峰  朱明辉 《湖北气象》2007,26(2):154-158

利用湘东南东江流域1959～2006年共48年的历史资料,采用统计分析方法,对东江流域历年雨水集中期的气候规律以及2006年雨水集中期的特征及成因进行了分析。分析结果表明:东江流域历年的雨水集中期多出现在6月和8月;东江流域雨水集中期的出现,受台风的影响较大。2006年由于04号台风"碧利斯"的影响导致了本年的雨水集中期出现在7月中旬,其特征是降水强度强、强降水范围广、过程降雨量大,而大尺度引导气流、南海季风对"碧利斯"的西行路径及降水强度影响较大。  相似文献