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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 [email protected]

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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 LXU B

[email protected]

Institute of Geology & Geophysics (IGG), Chinese Academy of Sciences (CAS), Beijing

IAEA CN191/56, 24 July 12, Vienna

1


Outline
Outline

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

2



500mm

1000mm

900mm

500mm

Sanjiang

Catchments

Annual Precipitation: 500 mm

400mm

300mm

1200mm

4




7


Past

Present

8



Outline1
Outline meters in 5 years

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

10


Wetland monitoring
Wetland meters in 5 years Monitoring

Water lever monitoring well

Evapo-transpiration data collection

11


Sampling groundwater
Sampling groundwater meters in 5 years

12


Sampling campaign in August meters in 5 years2011, along a 250km cross section. Monitoring of precipition has been continued in the mean time.


Sampling groundwater1
Sampling groundwater meters in 5 years

W-E cross section in the southern part of the region, where groundwater and other water bodies have been sampled for stable isotopes and tritium measurements.

a、Cross Section

b、Schematic Hydrogeology


Sampling soil water
Sampling soil water meters in 5 years

Description of the contents

Horizontal seepage Pipe

Horizontal seepage pond

Horizontal seepage channel

Horizontal seepage from the paddy field

15


Sampling soil water1
Sampling soil water meters in 5 years

16


Lab measurements qa
Lab measurements meters in 5 years & QA

DIONEX IC

liquid-water stable isotope instrument

17

ICP-OES

ICP-MS


Interlab comparison on Tritium measurements meters in 5 years

累积测试偏差所有实验室排名

地质所

(引自IAEA “TRIC2008” 报告)


Tritium measurement
Tritium measurement meters in 5 years

水同位素与水岩反应实验室


WICO meters in 5 years2011 Interlab on stable isotopes

水同位素与水岩反应实验室


Rice field plot test
Rice field plot test meters in 5 years

A test plot in a paddy field

21


Lab tests of c onstructed wetlands
Lab tests of c meters in 5 yearsonstructed wetlands

22


Outline2
Outline meters in 5 years

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

23


Groundwater monitoring in honghe qianfeng and qianshao farms
Groundwater monitoring in Honghe, Qianfeng and Qianshao farms

Decline of groundwater level

Well 1

Well 2

Well 3

24


Hydrological setting of honghe wetland
Hydrological setting of Honghe wetland farms

P

ET

Inflow

Outflow

25


Before farms 1950s

26


Present farms

27





Outline3
Outline farms

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

31




River farms water quality

Yalvhe

Nongjiang

Raolihe

  • Water quality of smaller rivers in the area has not been affected to a large extent by agricultural activities.

34


Soil water farms quality

35



farms

River water quality

Songhuajiang

Wusulijiang

37

Source: Environmental Ministry


Outline4
Outline farms

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

38


Conclusions
Conclusions farms

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.

39


Welcome to v isit website of our lab at www isoh2o org
Welcome to v farmsisit website of our lab at www.isoh2o.org

Thanks!谢谢!


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