This paper looks at changes in the frequency and duration of extreme hydrological events � floods and droughts � and their impacts on shifts in rainfed agriculture in semi-arid areas of the North Nile Sub-basin in Sudan.:
This paper used a modelling approach to examine the prospect of stormwater harvesting as an alternative source of water in water stressed regions. The approach assessed was managed aquifer recharge, which involved temporarily holding water in ponds so as to increase infiltration. The paper estimated recharge rates and optimal withdrawal rates from the aquifer.