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- Title
Assessing feasibility and efficacy of the Middle Route of the South-to-North Water Diversion Project in China.
- Authors
Zhang, Chong; Duan, Qingyun; Pan, Yun; Yeh, Pat J.-F.
- Abstract
The Middle Route of the South-to-North Water Diversion Project (MRP) was designed totransfer water from the Danjiangkou Reservoir (DR) in Hanjiang (HJ) to Jing-Jin-Ji (JJJ) andHenan (HN) regions to alleviate water shortage and groundwater over-exploitation in thoseregions. MRP has been under intensive scrutiny since the commencement in December 2014,mainly over its feasibility and efficacy of the designed water diversion volume. Thisstudy considers water-receiving (JJJ and HN) and water-delivering (HJ) regionalong the MRP conveyance route as the three study units. Assuming hypotheticallythat MRP had already been in operation during 2005-2014, three different waterdiversion scenarios are devised by referring to the actual implementation of MRPduring 2015-2017. An adaptive water diversion and allocation model is developedto evaluate the allowed water diversion volume (Qd) in HJ and the degree of therecovery of groundwater storage (GWS) in JJJ and HN as judged from the comparisonwith the historical groundwater level observations without water diversion. Resultsshow that the estimated Qd (4.6∼12.6 km3/yr) from HJ can reach the designedtarget of 6.2∼14.0 km3/yr except during the prolonged dry period with persistentlow reservoir inflow and high downstream water demand in HJ. Qd can contributeto the recovery of GWS by 3.0∼4.6 and 1.2∼2.2 km3/yr, and an increase of theregional water table by 0.3∼0.7 and 0.1∼0.3 m/yr, in JJJ and HN, respectively. Theimportant implication of this study is that due to the operation of MRP, the mean watertable depth is likely to recover from the present 30 m deep in JJJ and 8 m deepin HN to the mean depth in 1960s, namely, about 4 m deep for both JJJ and HN,in 40 years for JJJ and in 20 years for HN from the commencement of the MRP.
- Subjects
CHINA; WATER diversion; WATER shortages; WATER rights; WATER table; GROUNDWATER; CURRICULUM
- Publication
Geophysical Research Abstracts, 2019, Vol 21, p1
- ISSN
1029-7006
- Publication type
Article