Irrigation efficiency and consumption: The rebound effect in water

摘要: Water is increasingly scarce from climate change, population growth and higher demand for food irrigation. To ensure future security meet the increasing water in populated regions, agricultural sector has to improve irrigation efficiency with aim save water. However, these gains performance of irrigated agriculture will result an effective reduction unit price Therefore, consumption increases resulting a rebound effect. This increased partially offsets expected savings that may be achieved. Based on new version GTAP-W model, we assess extent effect use its economic implications when improved worldwide maximum attainable level. The model distinguishes between rainfed includes as explicit factor production agriculture. accounts sector, largest user freshwater resources. The results show improving level causes global total around 42 48 percent, depending scenario. estimated larger relative typical estimates energy demand. different regions varies widely their current levels, structure regional trade patterns. decomposed into three components: within own economy international trade. suggest relatively poor performance. These more because they experience positive impacts since competitive position improves compared other regions....