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Forest land use change at Trans-Boundary Laos-China Biodiversity Conservation Area

Journal of Geographical Sciences 2010年第6期20卷 889-898页

作者： hemmavanh chanhda YE Yanmei YOSHIDA A Land Resource Department Zhejiang University Hangzhou 310029 China Tea Research Institute Zhejiang University Hangzhou 310029 China Lao Government Secretary Board Office Prime Minister Office Lao PDR

This paper analyzed forest land use change in Trans-Boundary Laos-China Biodiversity Conservation Area which is called Namha National Biodiversity Conservation Areas （Namha NBCAs）, with 1992 and 2002 TM （ETM）. Based on GIS and statistical methods, the intensity, state index of land use change and transfer matrix were used to study spatio-temporal land use change in the region. The results showed that the area of forest land decreased greatly, also the area of bamboo and grassland decreased. The other way round, the area of unstocked forest, slash and burn and rice paddy land increased. As a whole, the intensity of forest land change was higher, but others were lower. From the transfer matrix, most of the forest land changed into unstocked forest and urban area, some to slash and burn The grassland and bamboo were mainly transferred to forest and unstocked forest. The unstocked forest land mostly came from forest land and grassland. It was showed there were three main causes of the land use change namely： opium poppy cultivation, rubber plantation and also ecotourism activities and finally some policies were developed in order to address the land use change in the study areas.

关键词： land use change rubber plantation opium poppy cuRivation Namha NBCAs, Laos

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Changes of forest land use and ecosystem service values along Lao-Chinese border:A case study of Luang Namtha Province,Lao PDR

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Forestry Studies in China 2009年第2期11卷 85-92页

作者： hemmavanh chanhda WU Ci-fang Yoshida AYUMI Department of Land Resource Management Zhejiang University Hangzhou 310029 P. R. China Zhejiang University Tea Research Institute Hangzhou 310029 P. R. China

Forest cover and land use change directly impact biological diversity worldwide, contribute to climate change and affect the ability of biological systems to support human needs by altering ecosystem services. Given the forest land use characteristics and ecosystem types in Luang Namtha Province, Lao PDR, the forest cover and land cover category of Luang Namtha Province were divided into six classes, i.e., current forest （CF）, potential forest （PF）, other wooded areas （OW）, permanent agricultural land （PA）, other non-forest areas （NF） and water （W）. In first instance, earlier geographic information data （GIS data） of forest cover and land use during 1992 and 2002 was obtained from the Ministry of Agriculture and Forestry （MAF）, Lao PDR. Two steps of forest land use change assessment were conducted by the MAF, i.e., plot sampling on satellite image maps （SIMs） to detect the changes of forest cover and land use during 1992 and 2002 for the entire Luang Namtha Province and field verification in order to identify causes of the changes. Secondly, dynamic information of the forest land cover changes during this ten-year period was calculated by means of map algebra in ArcGIS 9.2. Thirdly, based on the theory of ecosystem service functions and the service function values of different global ecosystems, the value of the six forest cover and land use categories in the province was obtained. Finally, ecological environmental effects, produced by the regional land cover changes over the study period, were calculated.

关键词： ecosystem services forest land use Luang Namtha Lao PDR

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Development of land valuation approach based on hedonic model--A case study of Vientiane capital city Laos

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Chinese Business Review 2010年第4期9卷 27-36,62页

作者： chanhda hemmavanh YE Yan-mei WU Ci-fang Ayumi Yoshida Department of Land Resource Management Zhejiang University Hangzhou 310029 China Tea Research Institute Zhejiang University Hangzhou 310029 China Lao Government Secretary Board Office Prime Minister Office Vientiane Laos

The aim of this study is to identify the variables affecting land value. Examined land was selected from the village in Vientiane capital city Laos. Data was collected from 100 villages in center of Vientiane capital city by using survey methods. A hedonic price analysis was conducted to determine the marginal return to different land characteristics using an econometric model corrected for correlation. Parcel characteristics such as distance to public park, village income, distance of population, number of the school within 500 meters buffer, distance to the temple, distance to the major market and distance to the business center (CBD). Arc GIS 9.2 was applied to calculate the distance of the factors, after that SPSS 15.0 was used to calculate the land price characteristic based on hedonic price model. The results showed that the distance to the center of population was the main factor influencing to the land price, and followed by school and village income. Map of the land price before and after hedonic price analysis were produced. The land price valuation approaches based on hedonic price model for Vientiane capital city were developed and land price map were predicted. Hedonic price model and GIS were very useful for this research, and finally the policy of the land valuation based on GIS was developed.

关键词：计量经济模型土地价值首都基础估价方法老挝价格模型土地价格

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