Manuscript prepared for Hydrol. Earth Syst. Sci. with version 2014/07/29 7.12 Copernicus papers of the LATEX class coperni- cus.cls. Date: 26 August 2014 Identifying water mass depletion in Northern Iraq observed by GRACE G. Mulder1, T.N. Olsthoorn1, D.A.M.A. Al-Manmi2, E.J.O. Schrama1 and E.H. Smidt1 1Delft University of Technology, Delft, The Netherlands. 2University of Sulaimani, Department of Geology, Sulaymaniyah, Iraq. Correspondence to:
[email protected] Abstract. Observations acquired by Gravity Recovery And large springs and rivers decreased substantially and data from Climate Experiment (GRACE) mission indicate a mass loss the GRACE satellite mission indicated a permanent loss of 3 of 31 ± 3 km or 130 ± 14 mm in Northern Iraq between 35 water mass in the region (UN-ESCWA and BGR, 2013; 2006 and 2009. This data is used as an independent valida- Voss et al., 2013). Decrease in rainfall and water availabil- 5 tion of a hydrologic model of the region including lake mass ity directly affected the water supply of towns and villages variations. We developed a rainfall-runoff model for five trib- (Michel et al., 2012) and caused a strong decline in crop utaries of the Tigris River, based on local geology and cli- yields in Northern Iraq (Trigo et al., 2010). About 100,000 mate conditions. Model inputs are precipitation from Trop- 40 people have left their homes in Northern Iraq as a conse- ical Rainfall Measurement Mission (TRMM) observations, quence of depleted water sources (McLeman, 2011). From 10 and potential evaporation from GLDAS model parameters.