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Title (Primary) Application of the water balance model J2000 to estimate groundwater recharge in a semi-arid environment - a case study in the Zarqa River catchment, NW-Jordan
Author Schulz, S.; Siebert, C.; Rödiger, T.; Al-Raggad, M.; Merz, R.;
Journal Environmental Earth Sciences
Year 2013
Department CATHYD;
Volume 69
Issue 2
Language englisch;
POF III (all) T34;
Supplements https://static-content.springer.com/esm/art%3A10.1007%2Fs12665-013-2342-y/MediaObjects/12665_2013_2342_MOESM1_ESM.pdf
Keywords Zarqa River; Jordan; Groundwater recharge; J2000 model; Calibration
UFZ wide themes RU2;
Abstract Pollution and overexploitation of scarce groundwater resources is a serious problem in the Zarqa River catchment, Jordan. To estimate this resource’s potential, the amount and spatial distribution of groundwater recharge was calculated by applying the hydrological model J2000. The simulation period is composed of daily values gathered over a 30-year period (July 1977 to June 2007). The figure finally obtained for estimated groundwater recharge of the Zarqa River catchment is 105 × 106 m3 per year (21 mm a−1). This is 19 % higher than the value previously assumed to be correct by most Jordanian authorities. The average ratio of precipitation to groundwater recharge is 9.5 %. To directly validate modelled groundwater recharge, two independent methods were applied in spring catchments: (1) alteration of stable isotope signatures (δ18O, δ2H) between precipitation and groundwater and (2) the chloride mass balance method. Recharge rates determined by isotopic investigations are 25 % higher, and recharge rates determined by chloride mass balance are 9 % higher than the modelled results for the corresponding headwater catchments. This suggests a reasonably modelled safe yield estimation of groundwater resources.
ID 14484
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=14484
Schulz, S., Siebert, C., Rödiger, T., Al-Raggad, M., Merz, R. (2013):
Application of the water balance model J2000 to estimate groundwater recharge in a semi-arid environment - a case study in the Zarqa River catchment, NW-Jordan
Environ. Earth Sci. 69 (2), 605 - 615