Table 6

Deep drainage and rooting depth for arid or semi-arid ecosystems.

LocationDeep drainage (mm/a)Maximum rooting depth (m)Mean annual rainfall (mm)Mean annual temperature (°C)Reference
Theis, Senegal30–50>3.547030–32Kizito et al. (2007)
Colorado, USA0.9–13180Chimner & Cooper (2004)
Various continental USA0c. 5Varies; modelledVaries; modelledSeyfried et al. (2005)
North-east Nigeria14 (mean; range 0–95)1.2431Eilers et al. (2007)
New Mexico, USA0.07–2.231–6230–3369.2–13.3Sandvig & Phillips (2006)
Northern Yucatan, Mexico2–3c. 100027.2Querejeta et al. (2007)