To sustain the upland conversion program （UCP） in China after the government compensation expires, we suggest an establishment of a domestic carbon market where forest carbon from the UCP can be traded. Taking south...To sustain the upland conversion program （UCP） in China after the government compensation expires, we suggest an establishment of a domestic carbon market where forest carbon from the UCP can be traded. Taking southwest China＇s Yunnan Province as an example, we explored the feasibility of switching the UCP to a carbon offset project. The breakeven carbon price which is equivalent to the opportunity cost of agricultural cultivation was estimated and then compared with the carbon price in the international market. We found that it is feasible to change the UCP to a carbon offset project if the duration is longer than 10 years at a discount rate of 7%, and if the recent bid price （147.2 Yuan.t-1） for Chinese carbon offset project prevails. The feasibility is better for converted land with lower productivity when the project duration is given. For a given site index, the feasibility is lower as pro- ject length is reduced. The results of sensitivity analysis show that the feasibility will be enhanced as the discount rate increases; however, the changes in the price of agricultural products and the amount of sequestered carbon have insignificant effects on the choice of sites and project duration.展开更多
China＇s Sloping Land Conversion Program has been implemented since 2002. It aims to achieve goals of ecological recovery and poverty alleviation, by retiring steeply sloping land from crop production and freeing surp...China＇s Sloping Land Conversion Program has been implemented since 2002. It aims to achieve goals of ecological recovery and poverty alleviation, by retiring steeply sloping land from crop production and freeing surplus agricultural labor for off-farm activities. Given the huge investment that has been poured into it, and its ecological and social impacts, this government-initiated program has attracted significant academic attention and triggered a flood of debate. Since 2004, the debate has concentrated on the sustainability of the program. Although targets have been overachieved in some provinces, concern has still emerged regarding the livelihood of farmers after subsidies stop. The present paper analyzes the implementation of the Sloping Land Conversion Program in Ningxia Autonomous Region, with a focus on the required social capital for sustained participation o f farmers and the development of off-farm economic activities.展开更多
One secondary target of the SLCP is poverty reduction. Therefore,the impact of the SLCP on household income is a subject of much research. This study was conducted to determine whether the SLCP has affected incomes of...One secondary target of the SLCP is poverty reduction. Therefore,the impact of the SLCP on household income is a subject of much research. This study was conducted to determine whether the SLCP has affected incomes of households at different income levels13 years after its implementation. Using survey data from 2012 on rural households＇ livelihoods in the upper reaches of the Minjiang River in Sichuan Province and using the non-participating households as a reference,the current impact of the SLCP on household income is calculated with a multiple linear regression model and a quantile regression model. The socio-geographic features of participating and non-participating households are also be compared. The results show no significant differences between the SLCP participating and non-participating households in many socio-demographic characteristics. Participating in the SLCP had no significant impact on household income at all income levels in the study area in 2012. This finding suggests that the SLCP is not currently increasing household income significantly in the study area,and that the implementation plan of the SLCP should be changed in this area in order to achieve its poverty reduction goal.展开更多
The Sloping Land Conversion Program （SLCP）is one of the biggest ecological rehabilitation efforts in China covering an area of 15.04million hectares （ha）and involving 20.19million rural households and 97.53million...The Sloping Land Conversion Program （SLCP）is one of the biggest ecological rehabilitation efforts in China covering an area of 15.04million hectares （ha）and involving 20.19million rural households and 97.53million farmers .Forestry extension plays a crucial role in the face of economic losses in the short run.This paper summarizes the extension schemes and methodologies adopted ,lessons learnt and specific case analysis is presented.The analysis shows that there is a need to combine the traditional,top-bottom approach with bottom=top＂problem solving ＂approach and strengthen the involvement and bi-directional communications of multiple stakeholders and sectors.This has significant implications for extension strategies to promote the participation of rural masses in ecological rehabilitation efforts that demand some sacrifices from them in the short run.展开更多
GPX and KML are open and multi-purpose,which are widely used in many fields such as basic geological survey,geochemical survey,geophysical survey,engineering survey and so on.Based on the analysis of the syntax featur...GPX and KML are open and multi-purpose,which are widely used in many fields such as basic geological survey,geochemical survey,geophysical survey,engineering survey and so on.Based on the analysis of the syntax features,basic structure and expression of GPX and KML files,this paper discussed the construction methods of GPX and KML files by taking the construction of navigation files of point information as an example.According to the specifications of GPX and KML files,an automatic construction program of GPX and KML files is designed and compiled,which realizes the automatic generation of batch point navigation files and supports in related software,and shows good effects of holding and displaying,which is helpful to simplify work flow and improve work efficiency.展开更多
In order to improve environment and relieve poverty, China has launched a series of major ecological engineering programs since the 1980 s. These include the Natural Forest Conservation Program, the Sloping Cropland C...In order to improve environment and relieve poverty, China has launched a series of major ecological engineering programs since the 1980 s. These include the Natural Forest Conservation Program, the Sloping Cropland Conversion Program, the Desertification Combating Program, and the Protection Forest System Construction Program. There is a growing need to quantify the contributions of these programs to regional carbon stocks.However, the lack of widely accepted, robust methods is one of the key obstacles to quantification. The objective of this study was to review existing methods for quantifying regional carbon stocks and then recommend suitable ones for the Chinese ecological engineering programs. We expect that the recommended methods can be applied to elsewhere in the world where there are similar characteristics and objectives.展开更多
Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss...Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss Equation and county-level socioeconomic data to assess the changes in the ecosystem service of soil conservation between 2000 and 2010, and to analyze its spatial characteristics and driving factors in the southwestern China. The results showed that cropland in the southwestern China decreased by 3.74%, while urban land, forest, and grassland areas increased by 46.78%, 0.86%, and 1.12%, respectively. The soil conservation increased by 1.88 × 10^(11) kg, with deterioration only in some local areas. The improved and the degraded areas accounted for 6.41% and 2.44% of the total land area, respectively. Implementation of the Sloping Land Conversion Program and urbanization explained 57.80% and 23.90% of the variation in the soil conservation change, respectively, and were found to be the main factors enhancing soil conservation. The 2008 Wenchuan earthquake was one of the factors that led to the degradation of soil conservation. Furthermore, industrial adjustment, by increasing shares of Industry and Service and reducing those of Agriculture, has also promoted soil conservation. Our results quantitatively showed and emphasized the contributions to soil conservation improvement made by implementing ecological restoration programs and promoting urbanization. Consequently, these results provide basic information to improve our understanding of the effects of ecological restoration programs, and help guide future sustainable urban development and regional industrial restructuring.展开更多
文摘To sustain the upland conversion program （UCP） in China after the government compensation expires, we suggest an establishment of a domestic carbon market where forest carbon from the UCP can be traded. Taking southwest China＇s Yunnan Province as an example, we explored the feasibility of switching the UCP to a carbon offset project. The breakeven carbon price which is equivalent to the opportunity cost of agricultural cultivation was estimated and then compared with the carbon price in the international market. We found that it is feasible to change the UCP to a carbon offset project if the duration is longer than 10 years at a discount rate of 7%, and if the recent bid price （147.2 Yuan.t-1） for Chinese carbon offset project prevails. The feasibility is better for converted land with lower productivity when the project duration is given. For a given site index, the feasibility is lower as pro- ject length is reduced. The results of sensitivity analysis show that the feasibility will be enhanced as the discount rate increases; however, the changes in the price of agricultural products and the amount of sequestered carbon have insignificant effects on the choice of sites and project duration.
基金the Dutch Royal Academy of Arts and Sciencesthe Chinese Ministry of Science and Technology
文摘China＇s Sloping Land Conversion Program has been implemented since 2002. It aims to achieve goals of ecological recovery and poverty alleviation, by retiring steeply sloping land from crop production and freeing surplus agricultural labor for off-farm activities. Given the huge investment that has been poured into it, and its ecological and social impacts, this government-initiated program has attracted significant academic attention and triggered a flood of debate. Since 2004, the debate has concentrated on the sustainability of the program. Although targets have been overachieved in some provinces, concern has still emerged regarding the livelihood of farmers after subsidies stop. The present paper analyzes the implementation of the Sloping Land Conversion Program in Ningxia Autonomous Region, with a focus on the required social capital for sustained participation o f farmers and the development of off-farm economic activities.
基金National Natural Science Foundation of China(41201603)
文摘One secondary target of the SLCP is poverty reduction. Therefore,the impact of the SLCP on household income is a subject of much research. This study was conducted to determine whether the SLCP has affected incomes of households at different income levels13 years after its implementation. Using survey data from 2012 on rural households＇ livelihoods in the upper reaches of the Minjiang River in Sichuan Province and using the non-participating households as a reference,the current impact of the SLCP on household income is calculated with a multiple linear regression model and a quantile regression model. The socio-geographic features of participating and non-participating households are also be compared. The results show no significant differences between the SLCP participating and non-participating households in many socio-demographic characteristics. Participating in the SLCP had no significant impact on household income at all income levels in the study area in 2012. This finding suggests that the SLCP is not currently increasing household income significantly in the study area,and that the implementation plan of the SLCP should be changed in this area in order to achieve its poverty reduction goal.
文摘The Sloping Land Conversion Program （SLCP）is one of the biggest ecological rehabilitation efforts in China covering an area of 15.04million hectares （ha）and involving 20.19million rural households and 97.53million farmers .Forestry extension plays a crucial role in the face of economic losses in the short run.This paper summarizes the extension schemes and methodologies adopted ,lessons learnt and specific case analysis is presented.The analysis shows that there is a need to combine the traditional,top-bottom approach with bottom=top＂problem solving ＂approach and strengthen the involvement and bi-directional communications of multiple stakeholders and sectors.This has significant implications for extension strategies to promote the participation of rural masses in ecological rehabilitation efforts that demand some sacrifices from them in the short run.
文摘GPX and KML are open and multi-purpose,which are widely used in many fields such as basic geological survey,geochemical survey,geophysical survey,engineering survey and so on.Based on the analysis of the syntax features,basic structure and expression of GPX and KML files,this paper discussed the construction methods of GPX and KML files by taking the construction of navigation files of point information as an example.According to the specifications of GPX and KML files,an automatic construction program of GPX and KML files is designed and compiled,which realizes the automatic generation of batch point navigation files and supports in related software,and shows good effects of holding and displaying,which is helpful to simplify work flow and improve work efficiency.
基金supported by grants from Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA05060101)Graduate Innovation Project Funding of Jiangxi Province(No.YC2013-S117)+1 种基金Jiangxi Provincial Science and Technology International Cooperation Project(No.09003614)GanPo 555 Talent Project Funding of Jiangxi Province
文摘In order to improve environment and relieve poverty, China has launched a series of major ecological engineering programs since the 1980 s. These include the Natural Forest Conservation Program, the Sloping Cropland Conversion Program, the Desertification Combating Program, and the Protection Forest System Construction Program. There is a growing need to quantify the contributions of these programs to regional carbon stocks.However, the lack of widely accepted, robust methods is one of the key obstacles to quantification. The objective of this study was to review existing methods for quantifying regional carbon stocks and then recommend suitable ones for the Chinese ecological engineering programs. We expect that the recommended methods can be applied to elsewhere in the world where there are similar characteristics and objectives.
基金Under the auspices of National Key Technology Research and Development Program of China(No.2011BAC09B08)Special Issue of National Remote Sensing Survey and Assessment of Eco-Environment Change between 2000 and 2010(No.STSN-04-01)
文摘Human activities significantly alter ecosystems and their services; however, quantifying the impact of human activities on ecosystems has been a great challenge in ecosystem management. We used the Universal Soil Loss Equation and county-level socioeconomic data to assess the changes in the ecosystem service of soil conservation between 2000 and 2010, and to analyze its spatial characteristics and driving factors in the southwestern China. The results showed that cropland in the southwestern China decreased by 3.74%, while urban land, forest, and grassland areas increased by 46.78%, 0.86%, and 1.12%, respectively. The soil conservation increased by 1.88 × 10^(11) kg, with deterioration only in some local areas. The improved and the degraded areas accounted for 6.41% and 2.44% of the total land area, respectively. Implementation of the Sloping Land Conversion Program and urbanization explained 57.80% and 23.90% of the variation in the soil conservation change, respectively, and were found to be the main factors enhancing soil conservation. The 2008 Wenchuan earthquake was one of the factors that led to the degradation of soil conservation. Furthermore, industrial adjustment, by increasing shares of Industry and Service and reducing those of Agriculture, has also promoted soil conservation. Our results quantitatively showed and emphasized the contributions to soil conservation improvement made by implementing ecological restoration programs and promoting urbanization. Consequently, these results provide basic information to improve our understanding of the effects of ecological restoration programs, and help guide future sustainable urban development and regional industrial restructuring.
