Advanced Materials Research Vols. 955-959

Abstract: Pond freshwater aquaculture, an important production mode, provides aquatic product for people, especially in south of China. Meanwhile, with the development of aquaculture technology of higher density and intensification, the environmental problem and pollution in freshwater pond have become even more acute. In this case, the water purification technology plays an important role in maintenance of the healthy aquaculture and there are a variety of water purification technologies in production practice. This paper is divided into four parts: a) the analysis of the causes of water quality deterioration in freshwater pond, b) the summary of water purification technologies in present, c) the brief analysis of the advantages and disadvantages of the in-situ remediation and ex-situ remediation, d) the prospection of pond water purification technologies in the future.

Abstract: Based on the database of Thomson Reuters, the bibliometric and patent information of China and US in the field of Clean Coal Technology from 2006 to 2011 are searched. The R&D capacity of China and US in the field of Clean Coal Technology are compared, the advantageous institutes in this field are identified. The cooperation trend between China and US on Clean Coal technology is analyzed. Some suggestions are proposed based on the data analysis.

Abstract: The Shiyang River Basin is one of the key research areas of sustainable economic and social development in the river basins of China. In order to figure out the mechanism of land-use expansion in the process of urbanization of Shiyang River Basin, the paper intends to carry out the evaluation of land-use expansion because of urbanization from the perspectives of social economy, regional transportation and ecological environment. By taking advantage of the land suitability evaluation method, it makes out the spatial framework of possible areas for urban expansion so as to provide suggestions for the further coordinative development of urbanization in the basin area as well as of the ecological zones.

Abstract: As acceleration of urbanization progress, suburban area becomes vital recreation destination for residents in metropolis. Tourism industrial elements concentrate in definite place where there are appropriate conditions for tourism development. This research aimed to identify different types of tourism agglomeration districts. There are two factors contributing to classification: Attraction location quotient and facility location quotient. Location quotient was calculated based on town panel data. Finally, agglomeration districts in suburban Beijing could be divided into three types. This paper is basic study for tourism cluster research, and can be adapted to recreation management for different develop modes.

Abstract: The research object of this paper is BiBei comprehensive land consolidation projects in Bishan County of Chongqing, analysis the land comprehensive consolidation impact on regional ecological service value. The results show: (1) Through comprehensive land consolidation, cultivated land and construction land increased, unused land decreased accordingly. (2) The ecosystem services value of arable land significant increase after comprehensive renovation; the ecosystem services value of garden and forest remain unchanged; the ecological services Value of unused land reduce. From profit or loss of individual services value in the ecological systems, gas regulation, water regulation, climate regulation, soil formation and protection, raw materials, biodiversity conservation, waste treatment, food production, entertainment and cultural and other functions have varying degrees of increase after land consolidation.(3) Overall, the ecosystem services value will increase after land consolidation. ecological construction of comprehensive land management model has changed the traditional purpose of comprehensive land management in order to achieve the balance of arable land only, indicates that in hilly areas, the ecological construction land comprehensive mode has changed the traditional mode of only in order to achieve the goal of arable land balance, enter in order to improve land productivity, improve agricultural ecological environment as the main target stage.

Abstract: The research object of this paper is comprehensive land consolidation pilot area in DaLu Town of Chongqing. Establish based on the PSR framework arable land intensive use of the evaluation system, dynamic evaluation of urban land high efficient intensive utilization in the study area form 2008 to 2012. The results show: (1) Through comprehensive land consolidation, three indicators have improved to varying degrees. (2)Improve the maximum is state index, its index increased0.3335; Improve second multi is pressure index, its index increased0.1043; Improve minimum is respond index, its index increased0.1000.(3)Overall, the level of intensive arable land use showed an increasing trend in study area. Through comprehensive land consolidation, intensive arable land use level improves the range of 29.70%.

Abstract: Based on the land use data observed over the Tailan River Basin (TRB) during the years 1990, 2000, 2005 and 2008, fractal theory is adopted and applied to expound spatial distribution characteristics and variation law of land use change in the arid inland TRB, Xinjiang, China. The results demonstrate spatial fractal characteristics in all land use types. The analysis indicate that the fractal dimensions of different land use types in the TRB are in the order of waters > industrial, mining and residential areas > farmlands > grasslands > unused lands > woodlands in 1990, and in the order of waters > industrial, mining and residential areas > grasslands > farmlands > woodlands > unused lands in 2000, and in the order of waters > industrial, mining and residential areas > grasslands > woodlands > farmlands >unused lands in 2005, and in the order of waters > industrial, mining and residential areas > grasslands > unused lands > woodlands > farmlands in 2008. The fractal dimension values of land use in the TRB in 1990, 2000, 2005 and 2008 are calculated as 1.5993, 1.5986, 1.6079 and 1.6348 respectively. Fractal dimension of land use in the basin is decreased at first then increased, the spatial structure of land used exhibit complex trend, while the land use types show an increase trend. The stability indexes of spatial structure of land use in the TRB in 1990, 2000, 2005 and 2008 are 0.1720, 0.1563, 0.1435 and 0.1428 respectively. These values suggest that the stability of the spatial structure of land use in the basin is gradually decreased.

Abstract: The land consolidation mode refers to the abstract summary of solutions for similar problems of land consolidation in the specific area. In such a brittle eco-area, the type of land use in loess plateau is varied and problems in land utilization have certain regional characteristics. By taking the example of the mining city of Shuozhou in Shanxi province and based on the analysis of the current situation of local land utilization and the major issues arising from such utilization in line with the rolling out of the project of Shuozhou land consolidation planning, this paper summarizes 13 consolidation modes under 4 categories with regional characteristics targeting four typical types of to-be-consolidated lands of farmland, rural residential land, abandoned land for industrial and mining purpose as well as unused land aiming at providing typical land consolidation modes for reference through in-depth study and practice.

Abstract: Based on the theory of unban carbon sink , search it according to actual situation of the study area and related research results, select the most important carbon sink factor which influenced ecological environment and other influences, take them as the effects the constraint conditions of urban ecological space, calculate kinds of carbon sink data. Endow different weight value according to their importance. The factors would be the mutual superposition based on the spatial analysis of GIS, form the ecological support spatial pattern with natural elements. The whole ecological network is constructed of source region, eco-corridors and ecological node with the space connectivity. At the end, optimize the urban ecological spatial pattern in the level of urban carbon sink distribution, help urban to become more perfect on planning and development.

Abstract: The spatial distribution of the landscape types for Maoershan region was found by the analysis of landscape nearest neighbor index and landscape connectivity index with ARC/INFO. The results showed that there were great difference of landscape connectivity between woodland and non-woodland; the nearest neighbor index of plantation was lower than that of natural forest; and the landscape pattern of natural forest were nearly the random distribution.