Climate Change and Water: Impacts & Management Needs 气候变化与水资源： 影响与管理需求

1. Climate Change and Water:Impacts & Management Needs气候变化与水资源：影响与管理需求 Roger Calow Water Policy Programme, ODI 罗杰

2. Overview概述 The big picture 概括 Irrigation – surface water systems 灌溉—地表水系统 3.Irrigation - groundwater economies 灌溉—地下水节约 4. Conclusions 总结

3. The most vulnerable?最脆弱群体？

4. Drivers of change & management challenges变化动因&管理挑战 Major drivers? 主要动因？ …urbanisation, industrialisation, consumption...with climate change overlay A water ‘crisis’? 水危机？ …who gets what (Q, Q, R) in a variable climate: farms vs cities, upstream vs downstream, environmental vs human Adaptation challenge? 适应挑战？ …mediating between competing claims: range of different scales Agricultural futures? 农业未来？ ...agriculture will lose water. How? Impacts on poorer households?

5. Agriculture & irrigation农业&灌溉 Two stories: • Surface water irrigation (IDs) • Development - state sponsored, driven • Management - increasingly commercial • Groundwater irrigation • More recent, increasingly farmer-led & opportunistic • Boreholes 1949 (0) – today (>5M)...concentrated in water scarce north • Controllability, affordability...impacts

6. Water withdrawals in Hebei by sector, 1990 – 2003河北省分部门采水量 Source: Hebei provincial WRD Statistical Yearbooks

7. Yellow River flows 1956-2000黄河水流量

8. Water allocation in the Yellow River Basin 黄河流域水资源配给 • Yellow River Allocation Plan（billion m3） Permit 1 Hangjin ID: 0.41 bcm Permits 2&3 Hetao ID: 4.77 bcm Defined under the YRCC’s Water Allocation Plan (long term) and adjusted under Annual Regulation Plans (annual) Defining and protecting farmers’ rights?

9. Irrigation diversion灌溉

10. Water allocation – basin to household水资源分配—从流域到用户 Basin Allocation Agreement Hangjin Irrigation District 280GL（abstraction) Hetao Irrigation District Other users Abstraction permits Group water entitlements Water User Associations Water User Associations Channel Losses Water certificates Household Household

11. Hangjin - channel lining夯井—分渠灌溉

12. Mugan Balahai Jianshe Channel lining and water transfer: winners…and losers? 分渠灌溉与水资源转移：赢家与输家？ Water Permit of 5860 mcm Gross permit before trading 410 mcm Water diverted before trading 375 mcm Return flow before trading 35 mcm Saving after trading 130 mcm Water diverted after trading 245 mcm Return flow after trading 35 mcm Gross diversion after trading 280 mcm

13. Key messages – IDs & water transfers关键点—IDs与水资源配给 • Irrigation will lose market share • Supply will fluctuate...variability will increase • Deepening rights reform (basin to farmer) will grow in importance • Protecting the interests of poorer households as water is reallocated will depend on: • Informal claims (WUAs, contracting) • Sound science – basin efficiencies, consumptive rights • Willingness to recognise effects on ‘3rd parties’ & environmental flows

15. ‘Water & Agricultural Management in Hebei’河北省水资源与农业管理

16. Total water withdrawals in Bashang counties, 1995 – 2005坝上县水资源抽取总量 7000 ) 6000 3 x 10 5000 Zhangbei 3 4000 Guyuan 3000 Shangyi Withdrawal (m Kangbao 2000 1000 0 Surface Ground Surface Ground Surface Ground water water water water water water 1995 2000 2005 Year Source: personal communication, Zhangjiakou City Water Affairs Bureau 2005.

18. Groundwater level changes recorded for three Bashang counties, 2003 – 2005地下水水位变化记录 Source: Zhangjiakou City Water Affairs Bureau, 2006.

19. Predicted groundwater level declines in the Bashang 可预测地下水位下降情况 Source: WAMH 2004. Note: drawdown modelled over a 10 year period based on 2003 estimates of groundwater abstraction and recharge.

20. Irrigation development and control areas in the Bashang

21. Control areas - well drilling in the Bashang控制区—井水抽取

23. Groundwater management challenge地下水管理挑战 Source: Shah, 2004

24. WUAs & quotas Progress: 进展 Shared allocations Conservation incentives Devolved management In the long-term: 长期 Scale-up to reduce free-riding Tie quotas to variable shares of aquifer safe yield

25. A farm economy?农业经济？

26. Shifting livelihoods生活水平变化 • Rural jobs – RNFE, migration • Rural incomes – diverse, dispersed • Dependence on CPRs - declining • Drivers of change – small push, big pull • Sources of vulnerability – income shocks • Nature of community – boundaries blurring • Rural development narrative – income, employment Vulnerable are locked in to the ‘old’ economy

27. Key messages – protecting high value aquifers & services主要信息—保护高价值地下蓄水层&服务 • Groundwater access – key role in poverty reduction • But monitoring patchy, numbers uncertain, impacts of climate change unclear • Protecting the interests of poorer households will depend on: • Extending access to GW irrigation • Prioritising domestic water • Protecting key reserves • A different approach to management…devolving tasks and functions…supported by sound science

28. Adaptation & development适应与发展

29. Conclusions结论 • Adaptation as development 发展型适应 • Climate as one pressure…气候压力 • Agriculture as a water bank农业=水资源银行 • Rural households as winners & losers…who are the losers? • 谁才是赢家与输家？

30. Thank you 谢谢 Beijing, February 2010 r.calow@odi.org.uk www.odi.org.uk\wpp