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Hydro-‐political Baseline of the Upper Jordan River - Ibrahim Abd El Al

Hydro-‐political Baseline of the Upper Jordan River - Ibrahim Abd El Al

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1320 km2, noting that “recharge to <strong>the</strong> Dan stream generates from a big part <strong>of</strong> <strong>the</strong> Anti-­‐<br />

Lebanon/Hermon range (actually laying in Lebanon and Syria)”, 10 though <strong>the</strong> lack <strong>of</strong> rainfall<br />

data compromises <strong>the</strong> accuracy <strong>of</strong> <strong>the</strong> figure. By way <strong>of</strong> comparison, <strong>the</strong> author estimates<br />

<strong>the</strong> subsurface catchment area <strong>of</strong> <strong>the</strong> Banias at only about 520km2, 11 while a hydro-­‐<br />

chemical estimate for <strong>the</strong> Hasbani has not yet been undertaken.<br />

As such, <strong>the</strong> recharge areas for all <strong>of</strong> <strong>the</strong> major springs in <strong>the</strong> <strong>Upper</strong> <strong>Jordan</strong> <strong>River</strong> are<br />

transboundary. The groundwater flowing across <strong>the</strong> Israeli border from Lebanon has been<br />

estimated from 170 MCM/y (Merheb 2010: 40) to 200-­‐210 MCM/y (Comair 2009: 242). Yet<br />

<strong>the</strong> hydro-­‐chemical modelling and analysis suggests that <strong>the</strong> bulk <strong>of</strong> <strong>the</strong> base flow <strong>of</strong> <strong>the</strong><br />

Liddan <strong>River</strong> (241-­‐249 MCM/y) derives from Lebanon and Syria. Given <strong>the</strong> likely hydraulic<br />

inter-­‐connectedness <strong>of</strong> <strong>the</strong> catchment areas, it fur<strong>the</strong>r seems probable that groundwater<br />

originating in Lebanon also feeds <strong>the</strong> base-­‐flows <strong>of</strong> <strong>the</strong> Banias (80 MCM/y) (from Table 3.3),<br />

and <strong>of</strong> course <strong>the</strong> Wazzani (64 MCM/y). Thus <strong>the</strong> total Lebanon-­‐Israel transboundary<br />

groundwater flows could be very roughly estimated at a large percentage <strong>of</strong> <strong>the</strong> entire base<br />

flows -­‐ say 250 to 350 MCM/y (which is close to estimates made by Najem (2011,<br />

pers.comm)). The figure is subject, <strong>of</strong> course, to significant uncertainty, given <strong>the</strong> absence <strong>of</strong><br />

reliable precipitation data, <strong>the</strong> extent <strong>of</strong> <strong>the</strong> groundwater recharge area, flow and<br />

percolation coefficients.<br />

3.3.2 A side note on Litani-­‐Hasbani hydrogeological connections<br />

There has been much speculation but very little informed debate about <strong>the</strong> hydraulic link<br />

between <strong>the</strong> Litani and Hasbani rivers through <strong>the</strong> geology <strong>of</strong> <strong>the</strong> mountain range that<br />

separates <strong>the</strong>m. The hydropolitical implication <strong>of</strong> <strong>the</strong> existence <strong>of</strong> such a link is that <strong>the</strong><br />

Litani <strong>River</strong> itself would be considered part <strong>of</strong> <strong>the</strong> <strong>Jordan</strong> <strong>River</strong> Basin, and hence an<br />

international transboundary (not strictly a Lebanese) river. This study has not sought to<br />

contribute to <strong>the</strong> debate, but has broached it tangentially. It has found no hydrogeological<br />

essays to establish <strong>the</strong> assertion, ei<strong>the</strong>r by <strong>the</strong> Lebanese authorities or by <strong>the</strong> Israeli army<br />

during <strong>the</strong>ir 22 year occupation <strong>of</strong> <strong>the</strong> area.<br />

The possibility <strong>of</strong> a hydraulic link was first asserted by Kolars (1992: 25), who suggests<br />

unaccounted Litani flows be attributed to unaccounted for Wazzani flows. The possibility is<br />

also asserted in Medzini and Wolf (2004) through a cursory exploration <strong>of</strong> an association<br />

between Hasbani flows and <strong>the</strong> water levels <strong>of</strong> Lake <strong>of</strong> Qara’oun.<br />

The idea <strong>of</strong> a hydraulic connection is refuted by Rimmer (2011, pers.comm.), who asserts<br />

both that <strong>the</strong> Hermon basin alone is large enough to supply <strong>the</strong> measured flows <strong>of</strong> <strong>the</strong><br />

10 The rough location <strong>of</strong> <strong>the</strong> origin <strong>of</strong> <strong>the</strong> groundwater flows is confirmed by Rimmer (2011, pers.comm).<br />

Similarly, Kolars (1992: 24) asserts that <strong>the</strong> Dan receives “practically all <strong>of</strong> its flows [which he counts at 239<br />

MCM/y] from unknown areas outside <strong>of</strong> its basin”.<br />

11 Comair estimates <strong>the</strong> exposed karst area at 400km2, <strong>of</strong> which 330km2 are within Lebanese territories<br />

(Comair 2009,p. 243).<br />

50

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