This paper introduces a Special Issue of Hydrological Sciences Journal containing 10 research papers which
present current applications of the Soil and Water Assessment Tool (SWAT) for water resources assessment. First, an
overview of selected, recently published papers with application of SWAT is given. The papers address the following
topics: nutrients and related best management practices (BMPs); sediments and related BMPs; impoundment and
wetlands; irrigation; bioenergy crops; climate change impact; and land-use change impacts. Then, papers from this
Special Issue are briefly described, covering the themes: surface runoff and sediments; nonpoint-source pollution;
surface water and groundwater; impacts of climate and land-use change; and large-scale SWAT applications. The
presented model applications of SWAT were conducted across a variety of spatial scales, physiographic regions and
climatic zones. This collection of papers demonstrates that applications of SWAT for water resources assessment are
growing in number and cover drainage basins in many regions worldwide