Presentation on theme: "1 Assessment of the Impact of Reclaimed Lands for Rice Fields and Water Conservation Zones on Water Budget and Quality for Sustainable Agriculture in Northeast."— Presentation transcript:
1 Assessment of the Impact of Reclaimed Lands for Rice Fields and Water Conservation Zones on Water Budget and Quality for Sustainable Agriculture in Northeast China PANG Z YUAN L KONG Y LUO L XU B firstname.lastname@example.org Institute of Geology & Geophysics (IGG), Chinese Academy of Sciences (CAS) Beijing IAEA CN191/56, 24 July 12, Vienna
2 Outline Introduction Methods and materials Hydrological regime Water quality Conclusions
Sampling campaign in August 2011, along a 250km cross section. Monitoring of precipition has been continued in the mean time.
Sampling groundwater W-E cross section in the southern part of the region, where groundwat er and other water bodies have been sampled for stable isotopes and t ritium measurements. a Cross Section b Schematic Hydrogeology
15 Horizontal seepage from the paddy field Description of the contents Horizontal seepage Pipe Horizontal seepage pond Horizontal seepage channel Sampling soil water
37 Songhuajiang River water quality Wusulijiang Source: Environmental Ministry
38 Outline Introduction Methods and materials Hydrological regime Water quality Conclusions
39 Conclusions Conversion of natural wetlands into paddy rice fields has changed the hydrological regime of wetlands systems to different extents, depending on their hydrogeological settings. Deterioration of surface water quality has been observed, though insignificant. There is a clear correlation to agriclutural activites. Groundwater quality has not been affected on the whole, likely attributing to the slow infiltration into the aquifers. In places where groundwater doesn't receive adequate recharge, river water needs to be used to ensure sustainability.
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