the arid zone encompasses land that has an imbalance between precipitation and losses through evaporation. globally, arid zones comprise large part of many countries in the mid-latitudes in both the northern and the southern hemispheres. both australia and iran are countries with a large arid zone. this negative water balance in the arid zone affects the type of land use in these countries. at ...

This paper reviews the current instruments in Colombian legislation for water management, including planning, economic and administrative instruments. In particular, it reviews theWatershedManagement andOrdering Plans, administrative permits for water use and pollution, as well as water use and water pollution charges. It analyzes how they could interact and be implemented in order to undertake...

A multivariate, principal-component based index has been developed to quantify the severity of droughts. Named the Aggregate Drought Index (ADI), it describes the meteorological, hydrological, and agricultural aspects of drought on a climate-divisional basis, using fluctuations in the values of five variables associated with the hydrologic cycle and available water: precipitation, evaporation, ...

The European Water Framework Directive establishes a framework for protecting water resources and prescribes a set of environmental objectives which are to be achieved by 2015. The Directive’s implementation will entail decisions which will have to consider multiple, uncertain decision outcomes, and which involve or affect a variety of stakeholders. A raft of methods such as cost benefit analys...

Planning, designing, and managing water resource systems today inevitably involve impact prediction. Impact prediction can be aided by the use of models. While acknowledging the increasingly important role of modeling in water resource planning and management, we also acknowledge the inherent limitation of models as representations of any real system. Model structure, input data, objectives, an...

Web Issue Analysis: An Integrated Water Resource Management Case Study Mike Thelwall School of Computing and Information Technology, University of Wolverhampton, Wulfruna Street, Wolverhampton WV1 1SB, UK. E-mail: [email protected] Tel: +44 1902 321470 Fax: +44 1902 321478 Katie Vann: Royal Netherlands Academy of Arts and Science. POB 95110, 1090 HC Amsterdam. The Netherlands. Email: Katie.V...