Since the early sixties continuing into the new millenium Egypt has settled on a strategy of reclaiming dessert land through groundwater abstraction, in order to increase their agricultural production. What effects, this strategy has on the Nubian Aquifer underlying large parts of the Western Dessert, has hitherto been unknown. The Gracity Recovery And Climate Experiment (GRACE) twin-satellite mission might be a means to examine this effect, since the mission is designed to measure changes in groundwater in aquifers on a scale of a few hundred kilometers and up. A total of 102 temporally unevenly spaced GRACE datasets covering the period from 2002 to 2010 were aquired from Center for Space Research, University of Texas consisting of a set of Stokes coefficients to degree and order 100. These were then gaussian filtered using a halfwidth of 0km, and averaged over a region of 300x300km. The time-series show a seasonal signal, but no interannual trend. This could indicate, that a drawdown is taking place in the summer as a result of irrigation, whereas groundwater is running into the area in the winther thus recharging the aquifer.
|Uddannelser||TekSam - miljøplanlægning, (Bachelor/kandidatuddannelse) Bachelor el. kandidat|
|Udgivelsesdato||1 jun. 2011|
- Water planning