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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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slide1

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

slide4

500mm

1000mm

900mm

500mm

Sanjiang

Catchments

Annual Precipitation: 500 mm

400mm

300mm

1200mm

4

slide8

Past

Present

8

outline1
Outline

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

10

wetland monitoring
Wetland Monitoring

Water lever monitoring well

Evapo-transpiration data collection

11

slide13
Sampling campaign in August 2011, along a 250km cross section. Monitoring of precipition has been continued in the mean time.
sampling groundwater1
Sampling groundwater

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

Description of the contents

Horizontal seepage Pipe

Horizontal seepage pond

Horizontal seepage channel

Horizontal seepage from the paddy field

15

lab measurements qa
Lab measurements & QA

DIONEX IC

liquid-water stable isotope instrument

17

ICP-OES

ICP-MS

slide18

Interlab comparison on Tritium measurements

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

水同位素与水岩反应实验室

slide20

WICO2011 Interlab on stable isotopes

水同位素与水岩反应实验室

rice field plot test
Rice field plot test

A test plot in a paddy field

21

outline2
Outline

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

outline3
Outline

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

31

slide34

River 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

slide37

River water quality

Songhuajiang

Wusulijiang

37

Source: Environmental Ministry

outline4
Outline

Introduction

Methods and materials

Hydrological regime

Water quality

Conclusions

38

conclusions
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.

39

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