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| Titel |
Groundwater Recharge and Flow Regime revealed by multi-tracers approach in a headwater, North China Plain |
| VerfasserIn |
Koichi Sakakibara, Maki Tsujimura, Xianfang Song, Jie Zhang |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250094145
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| Publikation (Nr.) |
 EGU/EGU2014-9744.pdf |
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| Zusammenfassung |
| Groundwater recharge is a crucial hydrological process for effective water management
especially in arid/ semi-arid regions. However, the insufficient number of specific research
regarding groundwater recharge process has been reported previously. Intensive
field surveys were conducted during rainy season, mid dry season, and end of dry
season, in order to clarify comprehensive groundwater recharge and flow regime of
Wangkuai watershed in a headwater, which is a main recharge zone of North China
Plain. The groundwater, spring, stream water and lake water were sampled, and
inorganic solute constituents and stable isotopes of oxygen 18 and deuterium were
determined on all water samples. Also the stream flow rate was observed. The solute
ion concentrations and stable isotopic compositions show that the most water of
this region can be characterized by Ca-HCO3 type and the main water source is
precipitation which is affected by altitude effect of stable isotopes. In addition,
the river and reservoir of the area seem to recharge the groundwater during rainy
season, whereas interaction between surface water and groundwater does not become
dominant gradually after the rainy season. The inversion analysis applied in Wangkuai
watershed using simple mixing model represents an existing multi-flow systems
which shows a distinctive tracer signal and flow rate. In summary, the groundwater
recharged at different locations in the upper stream of Wangkuai reservoir flows
downward to alluvial fan with a certain amount of mixing together, also the surface
water recharges certainly the groundwater in alluvial plain in the rainy season. |
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