Kuai P.,Beijing Normal University |
Li W.,Beijing Normal University |
Cheng G.,Shanxi Academy of Environmental Planning |
Ren G.-P.,Linfen Environmental Protection Bureau
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2014
Regarding the obvious features of multi-objectives, multi-elements and dynamic interlinks presented by urban complex system of society, economy and environment, the system dynamics (SD) method might be of great potential when applied into planning environmental impact assessment (PEIA) of urban plans due to the good theoretic feasibility and technical advantages. As a typical resource-based city in Shanxi province, Linfen was soliciting an imperative development transition and environmental treatment. Here, based on a comprehensive analysis of key development elements, current problems and driving factors of the city, the dynamic feedback relationships were first screened out among economic development, industrial restructure, energy saving and emission reduction, and environmental improvement. And then, a SD model was built up to simulate and assess the four proposed planning alternatives of urban transformation and development of Linfen. The results showed that if the maximum environmental restrains were employed, all the four alternatives would not be able to fulfill the planned growth targets featured by doubled per capita GDP. If the harder environmental restrains were adopted, the alternative III among the four would produce the best integrative effects on environment and economy of the city. Accordingly, the PEIA recommended the city to ensure the planned environmental improvements by slowing down the economic growth, restructuring the main industries represented by coal, coke and iron productions and power generations, strengthening energy saving and emission reduction, and lifting urban capacity of sustainable development.
Kuai P.,Beijing Normal University |
Li W.,Beijing Normal University |
Cheng R.,Beijing Normal University |
Cheng G.,Shanxi Academy of Environmental Planning
Journal of Cleaner Production | Year: 2015
A number of resource-based cities have suffered from unsustainable industrial pathways and aggravated environmental devastation. For such types of cities, especially in developing countries, it is imperative to launch a green industrial transformation that calls for considering more alternatives that involve environmental concerns in the planning process. This study aims to develop a system dynamics model for evaluating different planning alternatives concerning three prominent factors: industrial scale, structure, and efficiency; the findings are expected to assist decision-makers with a wider perspective in retrofitting the industrial system. Linfen, a typical Chinese resource-based city, is taken as a case. The results showed that compared with structure adjustment and technical progress, scale control should be taken as the foremost transformation measure for some cities with more excessive industrial capacities or in even worse environmental situations. For Linfen, the production capacities of its four main industries, i.e., coking, iron making, steel making and coal-power generation, need to be cut down, respectively, by 18.0%, 8.6%, 12.7% and 64.2% compared to the local industrial department's preferred options. Because of its capability to depict sophisticated interactions of environmental issues and industrial factors under diversified circumstances, alternative evaluation with the SD model is of great potential for delivering more integrated knowledge to decision-makers in industrial planning towards green transformation. © 2015 Elsevier Ltd. All rights reserved.
Zhu J.-J.,Hebei Normal University |
Zhu J.-J.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research |
Zhu J.-J.,University of Chinese Academy of Sciences |
Chen H.,Hebei Normal University |
Gong G.-L.,Shanxi Academy of Environmental Planning
Huanjing Kexue/Environmental Science | Year: 2015
Stable hydrogen and oxygen isotopes can be used as a tracer to analyze water vapor sources of atmospheric precipitation. We choose Golmud and Delingha as our study areas, Golmud locates in the south of Qaidam basin, and Delingha locates in the northeast. Based on the analysis of monthly change of hydrogen and oxygen isotopic compositions of precipitation during June to September of 2010, and the relationship between δ D and δ18O in precipitation, we investigated the water vapor sources of precipitation in eastern Qaidam basin. The results show that: ① meteoric water line between June to September in Golmud is: δ D=7.840δ 18O-4.566 (R2=0.918, P<0.001), and in Delingha is: δ D=7.833δ18O+8.606 (R2=0.986, P<0.001). The slopes and intercepts of meteoric water line between June to September in both Golmud and Delingha are lower than the global average, and the intercept in Golmud is only-4.566, which indicates the extremely arid climate condition. ② the δ18O content of precipitation is much higher in Golmud in early July, it shows the enrichment of some heavier isotopes. However, the δ18O content of precipitation becomes lower from late July to early September, especially for the late September. The δ18O content of precipitation in Delingha is higher in June to August than that in late September. ③ the water vapor sources of precipitation in Golmud and Delingha are different, Golmud area is the northern border of Qinghai-Tibet Plateau where the southwest monsoon can reach, and the southwest monsoon brings water vapors of precipitation, but the water vapors of precipitation in Delingha are mainly from local evaporation. ©, 2015, Huanjing Kexue/Environmental Science. All right reserved.
Huang L.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research |
Cao W.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research |
Wu D.,Nanjing Institute of Environmental Sciences |
Gong G.-L.,Shanxi Academy of Environmental Planning |
Zhao G.-S.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research
Chinese Journal of Applied Ecology | Year: 2015
In this paper, the dynamics of ecosystem macrostructure, qualities and core services during 2000 and 2010 were analyzed for the key ecological function zones of China, which were classified into four types of water conservation, soil conservation, wind prevention and sand fixation, and biodiversity maintenance. In the water conservation ecological function zones, the areas of forest and grassland ecosystems were decreased whereas water bodies and wetland were increased in the past 11 years, and the water conservation volume of forest, grassland and wetland ecosystems increased by 2.9%. This region needs to reverse the decreasing trends of forest and grassland ecosystems. In the soil conservation ecological function zones, the area of farmland ecosystem was decreased, and the areas of forest, grassland, water bodies and wetland ecosystems were increased. The total amount of the soil erosion was reduced by 28.2%, however, the soil conservation amount of ecosystems increased by 38.1%. In the wind prevention and sand fixation ecological function zones, the areas of grassland, water bodies and wetland ecosystems were decreased, but forest and farmland ecosystems were increased. The unit amount of the soil wind erosion was reduced and the sand fixation amount of ecosystems increased lightly. In this kind of region that is located in arid and semiarid areas, ecological conservation needs to reduce farmland area and give priority to the protection of the original ecological system. In the biodiversity maintenance ecological function zones, the areas of grassland and desert ecosystems were decreased and other types were increased. The human disturbances showed a weakly upward trend and needs to be reduced. The key ecological function zones should be aimed at the core services and the protecting objects, to assess quantitatively on the effectiveness of ecosystem conservation and improvement. ©, 2015, Editorial Board of Chinese Journal of Applied Ecology. All right reserved.