River health and Eflows project summary of findings
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River health and Eflows project summary of findings

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  • Products are…..
  • Equivalent recommendations for each of the pilot rivers
  • Contrast with Tenant method
  • GIWP Publications…
  • Upper catchment in better condition; biotic indicators more sensitive than WQ indicators
  • These results prepared for each of the 3 pilot studies
  • Thanks yous; goodwill and great support; good luck…

River health and Eflows project summary of findings River health and Eflows project summary of findings Presentation Transcript

  • 中国河流健康与环境流量项目 :主要成果Robert Speed北京, 2012 年 2 月 23 日
  • 大纲1. 项目简介2. 环境流量评估3. 河流健康评估4. 主要发现和建议
  • 大纲1. 项目简介2. 环境流量评估3. 河流健康评估4. 主要发现和建议
  • 基本情况 :•2009 年 9 月 – 2012 年 3月•400 万澳元•2 个主题 : • 河流健康 • 环境流量
  • 现状回顾 技术路线 黄河流域 ( 黄河下游 ) 政策发展;国 能力发展试点 际回顾 珠江 流域 ( 桂江 )区域 辽河流域 ( 太子河 )评估河流健康和环境 国家层面的建议流量需求
  • 大纲1. 项目简介2. 环境流量评估3. 河流健康评估4. 主要发现和建议
  • Identify assets Set objectives for each asset Develop preferred e-flow rules Outcomes and risks understoodModel e-flows and security of supply against targetsPresentation Heading
  • Lower Yellow River: Key Ecological Assets
  • Flow objectives for lower Yellow River
  • Recommended flow regimeLower Yellow River, reach 1 (low risk)
  • Presentation Heading
  • E-flows assessment method• Asset-based approach• Holistic approach• Capacity to adapt method to the situation – Data time, or cost constraints• Allow for informed decisions; basis for making trade- offs
  • Environmental flows policy and water allocation
  • Overview1. Introduction to the project2. Environmental flows assessment3. River health assessment a. Pearl and Liao pilots b. Yellow River pilot c. Hydrology4. Summary of findings and recommendations
  • Important steps 项目发展的重要步骤1 Identify the objectives the program 确定项目目标 Identify the objectives of of the program确定项目目标2 Identify suitable measures (indicators) of drivers, stressors and response 确认合适的驱使因素,压力源和反应的指标3 Develop conceptual models linking range of drivers to potential impacts 联系驱使因素和潜在影响开发概念模型4 River Classification to identify homogenous ‘river types’ 河流分类从而确认相同的河流类型5 Trial sampling program and refinement of indicators 采样试验,完善指 标6 Selection of suitable benchmarks for ecological indicators 选取合适的生态指标的基准7 Reporting & Communication 报告和交流8 Implement management actions to address priority areas/threats 执行管理行动,明确地区 / 威胁的优先顺序
  • Classification
  • Assessment against disturbance gradientSR of Macroinvertbrate 50 Individuals of Fish 80 40 60 Fi_D M_S 30 40 20 20 10 0 100 150 200 250 300 350 5 10 15 20 EC Conductivity Urbanization %Construction in Catchment (LR) Richness= 3.7027 – 0.0024EC. (LR) Ind. = 4.4303 – 0.1382*Urban%. P < 0.0001. Adjusted R2 = 0.1502. P < 0.0001. Adjusted R2 = 0.3169.
  • Indicators selectedTaizi River Indicators with significant* relationship with stressors Water quality: EC, NH3-N, TN, TPMountain Macroinverts : SR , BMWP , EPT R(F)region Fish : F-IBI; A: A-IBI Water quality: EC, volatile phenols, NH3-N, TN, TPHills Macroinverts : SR , BMWP , EPT R(F) Fish : F-IBI; A: A-IBI Water quality: EC, BOD5, CODCr, NH3-N, TN, TPFloodplain Macroinverts : SR , BMWP , EPT R(F) Fish : F-IBI; A: A-IBI *(p<0.05)
  • Reference values and benchmarking Freq. All sites – all years ,所有点,所有年 (# obs.) ,监测频率Reference sites Single site , Standard– all years ,参考点,所有年 – report year ,单 to achieve values th 点,报告年 95th %’ile 50 %’ile 80th %’ile 1 0 Concentration ,浓度 (reference) ,参考点 (worst case) ,最差 Convert all values to common scale to allow comparison 转化所有结果使其成具有可比性 Compare values against: 结果比较 - other sites in study; other studies 与其他点进行比较,与 其他研究结果进行比较 - national standards; international standards 国家标准,国 际标准
  • Reporting on river health
  • Objectives framework (from YRCC) 目标框架(来自水利部黄河水利委员会“The 4 Nos” 四不准 )• No embankment breaching 水不漫堤• No river running dry 无河流干涸• No water pollution beyond standard 无超出标准的水体污染• No river bed rising further 无河床上升“Healthy Indicators of the Yellow River”• Flow continuity 河流连续性 Hydrology 水文学• Channel configuration for water and sediment Geomorphology 地貌学 transportation 水和沉积物流动通道的容 量 水质 Water quality• Water quality standard 河水质量标准 Ecology 生态 River ecosystem 河流生态系统 Social-economic• 社会经济• Water supply capacity 河水供应容量
  • 河流健康的报告卡
  • Hydrology and stream health• Index of flow heath – based on e-flows assessment• Index of flow deviation – based on deviation from natural flow regime
  • Index of Flow Deviation Seasonality altered (SFS) 50th percentile in ref erence period Low f low season volume High f low season volume 25th percentile in greatly reduced (LFV) greatly reduced (HFV) ref erence period Year 1999/2000 800 700 Highest monthly f low Persistently moderately reduced high (PHF)3  1 6) 600 f rom ref erence (HMF) Persistently low (PLF) 0 and persistently 500 very low (PVL) 400 Lowest monthly f low 300 greatly reduced f rom ref erence (LMF) 200 m M w h n o y ( f t l 100 0 Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct
  • Example output• Score for each year• Sub-indicators show which parts of flow regime unhealthy• Sensitive mainly to regulation and also to natural variation – As for biological indicators
  • “Flow Health” software tool
  • Overview1. Introduction to the project2. Environmental flows assessment3. River health assessment4. Summary of findings and recommendations
  • River health assessments1. Importance of objectives-based approach to assessment2. Indicators need to be tested for local relevance: against disturbance and/or objectives3. Maximise use of existing data4. In the first instance, establish consistent approach to data collection – importance of quality control/quality assurance• It is not necessary to use the same indicators to compare across sites• Classification of river types is important to support establishment of suitable reference conditions
  • Environmental flows2. Importance of objectives-based approach3. Value of holistic method of assessment: consistent with concept of scientific development4. Adapt the method to suit the situation – Acknowledge the value of healthy rivers5. Recognise that e-flows are central to the water allocation process – Make informed decisions when allocating water allocation – Establish allocation and management measures to support e-flows
  • Further information www.watercentre.org• Technical reports• Summary documents• Detailed case-studies• Report cards• Training materials• FlowHealth software tool
  • Thank you!