Climate change influence on runoff and soil losses in a rainfed basin with Mediterranean climate

Abstract

The present research shows the results of possible effects of climate change on runoff and soil loss in a rainfed basin located in the Alt Penedès and Anoia region (NE Spain). Viticulture is an important economic activity in this region, and vines for the production of high-quality wines and ''cavas'' are the main land use. Climate data for the period 2000-2012 and detailed soil and land use maps were used as input data for soil and water assessment tool to model the effects of climate change. The analysis compared simulated results for years with different climatic conditions during that period with predicted temperature and precipitation data for 2020, 2050 and 2080 based on data obtained from the Hadley Centre Coupled Model, version 3, A2 scenario and the trends observed in the area. The research confirmed the difficulty of predicting future soil loss in this region, which has very high inter-annual climate variability. Despite only small changes in precipitation, the model simulated a decrease in soil loss associated with a decrease in runoff, mainly driven by an increase in evapotranspiration. However, the trend in soil losses may vary when changes in precipitation balance the increase in evapotranspiration and when rainfall intensity increases. An increase in maximum rainfall intensity in spring and autumn (main rainy seasons) produced significant increases in soil loss: as high as 12 % for the 2020 scenario and 57 % for the 2050 scenario.

Assessment of climate change impacts on streamflow and hydropower potential in the headwater region of the Grande river basin, Southeastern Brazil

“…Several studies evaluating the impacts of climate change on hydrology using hydrological models like SWAT (Arnold et al ., ; Srinivasan et al ., ) driven by RCM/GCM outputs have been performed around the world (Kay et al ., ; Jung et al ., ; Huang et al ., ; Ouyang et al ., ; Ramos and Martínez‐Casasnovas, ; Uniyal et al ., ) as well as in Brazil (Collischonn et al ., ; Siqueira Júnior et al ., ; Ho et al ., ).…”

Dynamic Impacts of Climate and Land-Use Changes on Surface Runoff in the Mountainous Region of the Haihe River Basin, China

“…In a water-limited region, the influence of climate change is usually represented by various stages of the water cycle, for example, rainfall and evapotranspiration [8][9][10]. Empirical models, such as timeseries analyses and hydrological mechanisms, have been used to study the influence of climate change on runoff variation [11][12][13].…”

Identifying the Influence of Land Cover and Human Population on Chlorophyll a Concentrations Using a Pseudo-Watershed Analytical Framework

“…Increased agricultural demand [13] and urbanization [14,15] both have contributed to increased runoff into lakes. All types of land cover contribute nutrients from the watershed into waterways, although the amounts and types of nutrients that come from nonpoint sources depend on a variety of drivers that include weather, topography, soil properties, land characteristics and management practices [16,17]. Here, we focus on further understanding the role of land cover and human population on chlorophyll concentrations in lakes worldwide.…”