Compounding effects of human activities and climatic changes on surface water availability in Iran

Climatic Change - By combining long-term ground-based data on water withdrawal with climate model projections, this study quantifies the compounding effects of human activities and climate change...     

Simultaneous adoption of risk management strategies to manage the catastrophic risk of maize farmers in Bangladesh

GeoJournal - Risk and uncertainty are distinctive features of agricultural cultivation, which significantly affect the production and income. Risk management is an important way for farmers to...     

Sedimentological,Geochemical and Hydrogeochemical Studies of Alluvial Fans for Mineral and Environmental Purposes (Case Study of Southwestern Iran)

Lithology and Mineral Resources - The alluvial-fan sediments play a very important role in mineral reserves and underground water resources, though a comprehensive study on such sediments,...     

Investigating the effects of land use change on flood hydrograph using HEC-HMS hydrologic model (case study: Ekbatan Dam)

Natural Hazards - Hydrological modeling academic studies have focused on the response to human-caused land use changes. The effects of land use change on flood degree in the catchment basin of...     

Study on the Erodibility and Mechanical Resistance of Mulches Prepared from Micro Silica–Cement Mixtures

Geotechnical and Geological Engineering - Mulching is fastest strategy to control sand dune movement in arid and semiarid areas. In the present study the effect of micro silica- cement mixture was...     

A New Correlation to Predict Rock Mass Deformability Modulus Considering Loading Level of Dilatometer Tests

Geotechnical and Geological Engineering - All numerical and analytical methods dealing with the calculating deformation of rock mass require deformation modulus (Df) which is measured by direct or...     

昆仑山北麓克里雅绿洲生态服务价值对土地利用变化的响应

基于1991、2002与2008年卫星遥感资料,采用中国陆地生态系统的服务价值测算方法,分析克里雅绿洲土地利用变化对生态系统服务价值与结构的影响。研究表明:①研究区生态服务价值从1991年的144 224.8万元降到2008年的128 716.3万元,生态服务价值损失10.8%,每年净损失生态服务价值达24.2元/hm2。生态服务总价值的减少主要是由湿地、水域总面积的减少而导致的;②研究区各生态服务功能对区域总生态服务价值贡献率由高到低依次为:废物处理、土壤形成、生物多样性保护、水源涵养、气候调价、气体调价、食物生产、娱乐休闲和原材料;③研究区生态服务价值对生态服务功能指数缺乏弹性。     

Ion acoustic solitary waves in plasma with nonthermal electron,positron and warm ion

In this paper, the characteristics of ion acoustic solitary waves are studied in plasmas containing warm ion fluid, non-thermally distributed electron and positron. We study the effects of non-thermal electrons and ion temperature on solitons by Pseudo-potential method and show that the parametric region where ion acoustic solitons can exist is modified. We also obtain linear dispersion relation by using the standard normal-modes analysis.