长江流域农业地域分异及专业化生产研究

长江流域是我国农业生产的重要区域,农业发展总体水平高于全国平均,但流域内农业发展的自然条件,资源状况、人文特点等不尽一致,各省市农业发展在农业、农村经济、农业生产投入、农业及粮食生产等方面存在较大的地域差异。运用主分量分析法,得出各 综合评价结果;并在此基础上,根据主导农产品专业化生产和发展方向的分异,将长江流域划分为３个大区１７个亚区。     

加强区域性中心城市建设在西部大开发中的作用

在分析区域性中心城市的条件和作用的基础上,针对目前西部区域城市发展体系的严重不完备,强调培育功能健全,经济发达,具有相当规模的区域性中心城市在实施西部大开发中的重要性与迫切性。     

我国沙区防沙治沙的区域模式

回顾了我国防沙治沙的经验和成就,论述了目前防沙治沙工作存在的不足,提出了今后防沙治沙应遵循的生态建设原则,即：水分平衡原则、景观和生物多样性原则、沙区土地利用的优化配置原则、防沙治沙“以保为主,先保后治”原则以及治沙与治穷并重的原则。根据不同的自然地理条件和社会神经发展水平,将我国沙区划分为４类防沙治沙区域生态建设和产业发展模式,它们分别是首都圈模式,农牧交错带模式,草原区模式和荒漠绿洲模式。对沙     

区域环境问题和区际环境协作

本文阐述了区域环境问题的形成机制和区域间环境影响机制 ,提出进行区际环境协作加强区际环境调控以解决区域环境问题的新思路。     

Regional governance and hazard information: the role of co-ordinated risk assessment and regional spatial accounting in wildfire hazard mitigation

With the threat of wildfire hanging over many communities in the Western and Southern United States, wildfire mitigation is evolving into a significant public responsibility for rural and urban edge county governments. Regional governance is an important piece of the effort to reduce wildfire risks although still weakly developed as a policy arena. This project explores two dimensions in which planning support systems can support regional governance: assessing patterns of wildfire risk accumulation; and, evaluating land use planning alternatives and their effects on cumulative risk levels. These tools are examined for regional governance using a prototype planning information system, the Alternative Growth Futures (AGF) tool, a scenario-building approach developed at the University of Colorado Denver. The project develops a hybrid urban growth model that integrates logistic regression techniques and methods for simulation of growth alternatives. This model is used to evaluate the attractiveness of undeveloped building sites with respect to natural amenities, distance to primary urban services and site characteristics such as slope. The model and scenario-testing framework are reasonably robust and suggest that regional spatial accounting methods have potential as a framework for inter-governmental and public discussion around wildfire planning.     

Regional Economic Types and Development Strategy of Small Towns in Suburb Beijing

The purpose of this article is to classify the regional economic types and development dynamics of small towns in suburb Beijing by applying the classification methods developed by Nelson's method and Location Quotient method into 183 small towns in Beijing.Four types of small towns are thus identified,including urban agriculture dominated towns,manufacturing dominated towns,service industry dominated towns and comprehensive type towns with balanced economic development.Within the environment of geographical information system,the spatial distribution pattern of four types of small towns with their evolution trend is analyzed.The results indicate that four types of small towns have obvious 'core-periphery' spatial structure but with different functional orientations and evolution mechanisms.Based on this,the different development strategies for each type of small towns are summarized,providing a scientific reference for the differentiating planning and development strategies of these small towns.     

关中—天水经济区产业结构对区域经济增长的影响

关中—天水经济区产业结构与经济增长之间有着密切的关系。随着区域经济的增长,产业结构的不断演进,同时产业结构的调整也促进了经济的增长。运用偏离—份额分析法研究了关中—天水经济区产业结构对经济增长的影响,提出了相应的发展对策和建议。     

我国林业发展的区域差异分析

采用偏离—份额和区位熵分析法,以2003—2006年为考察期,以全国为参照系,对我国31个省(区、市)的林木培育和种植、竹木采运、林产品的行业专业化程度、产业结构、竞争力的区域差异进行了分析。在上述分析基础上,结合全国和地区的林业发展状况,提出调整和优化林业产业结构、促进林业发展和改善林业经济增长质量的对策及建议。     

Application of Index Procedures to Flood Frequency Analysis in Turkey1

Abstract: This study investigates the regional analysis of annual maximum flood series of 48 stream gauging stations in the basins of the West Mediterranean Region in Turkey. The region is divided into three homogeneous subregions according to both Student‐t test and Dalrymple homogeneity test. The regional relationships of mean annual flood per unit area‐drainage area and coefficient of skew‐coefficient of variation are obtained. Two statistically meaningful relationships of the mean flood per unit area‐drainage area and a unique relationship between skewness and variation coefficients exist. Results show that the index‐flood method may be applicable to each homogenous subregion to estimate flood quantiles in the study area.     

Modeling the Potential of the Northern China Forest Shelterbelt in Improving Hydroclimate Conditions1

Abstract: The forest shelterbelt (afforestation) project in northern China is the most significant ecosystem project initiated in China during the past three decades. It aims to improve and conserve the ecological environment in the project areas. The tree belt stands along the southern edge of the sandy lands, nearly paralleling to the Great Wall. This study used a regional climate model to simulate the potential of improving regional hydroclimate conditions resulting from the afforestation project. Two simulations with preafforestation and postafforestation land cover were performed over East Asia from January 1987 to February 1988. The model resolution is 60 km. The differences between the two simulations suggest that the northern China forest shelterbelt project is likely to improve overall hydroclimate conditions by increasing precipitation, relative humidity, and soil moisture, and by reducing prevailing winds and air temperature. The effects are more significant in spring and summer than fall and winter. Changes in many hydrologic properties (e.g., evapotranspiration, soil moisture, and water yield), however, differ between the dry Northeast China and the moist Northeast China. The hydroclimate effects are also found in the surrounding areas, featured by noticeably moister conditions in the area south of the afforestation project. The results imply that the shelterbelt project would reduce water yield in afforested Northwest and North China during spring, but increase water yield in the afforested Northeast China as well as in the southern surrounding area, offset some greenhouse effects, and reduce the severity of dust storms. Possible improvements of this study by using actual afforestation data, modeling with higher resolution, longer integration and more detailed processes, and analyzing the physical mechanisms are discussed.