Slide 1

IWRM & HYDROLOGIC CYCLE COMPONENTS Keith Kennedy Swiss Center of Hydrogeology University of Neuchatel 25 June 2003 Slide 2 2 IWRM PERSPECTIVE Presentation Outline 1.Basic hydrologic cycle aspects 2.Special groundwater considerations 3.Data base example (regional) 4.Questions and discussion 5.Considerations in changing hydrologic thinking Slide 3 3 IWRM PERSPECTIVE Structure Economic Efficiency Equity Environmental Sustainability Management Instruments Enabling Environment Institutional Frameworks Balance water for livelihoods and water as a resource Principles Slide 4 4 OUR IWRM TRIANGLE Slide 5 5 ------------------------------------------------------------------------------------------------------------------------------------------- Assessment Cycle applicable components Information Setting characterization Quantity,Quality,Timing,Cost Demand Supply Use Protection Alternatives Data (sources, reliability, access, links) Allocation Tools DSS models Tradeoff analysis ------------------------------------------------------------------------------------------------------------------------------------------- Slide 6 6 Discussion Content 1.Cycle Component Concepts (10) Standard/Conventional Ecosystem, use related Catchment/Aquifer based 2.Quantification Aspects (30) Resource Definition Water Use, Flowpaths & Sustainability Monitoring & Evaluation 3.Ground water considerations 4.Data Bases (10) Input/Output/Storage Access/Linkages Quality 5.Conclusions(10) Slide 7 7 1. Cycle Component Concepts Standard Concepts (Physical) Precipitation Evaporation/Evapotranspitation Surface Water Groundwater Ecosystem & Use Related (Basin/Watershed Perspective) Green water (Terrestrial ecosystems, Crops, Wetlands) Blue water (Throughflow, Consumptive use & return flow) Slide 8 8 Basic Cycle Ocean Evaporation Evaporation (ET) runoff Precipitation Aquifer Infiltration Evaporation Precipitation Evaporation/ET Surface Water Groundwater Slide 9 9 Basic Cycle Slide 10 10 Basic Cycle Slide 11 11 1. CYCLE COMPONENTS - Related Groundwater Contamination Issues Slide 12 12 SW/GW relations - Humid vs Arid Zones A. Cross section of a gaining stream, which is typical of humid regions, where groundwater recharges streams B. Cross section of a losing stream, which is typical of arid regions, where streams can recharge groundwater Slide 13 13 Basic Cycle Temperate climate Semi-arid climate Arid climate %mm% % Total precipitation100500 - 1500100200 - 5001000 - 200 Real evapotranspiration~ 33165 - 495~ 50100 - 250~ 700 - 140 Groundwater recharge~ 33165 - 495~ 2040 - 100~ 10 - 2 Surface runoff~ 33165 - 495~ 3060 - 150~ 290 - 58 Approximate annual hydrological budget Slide 14 14 1. Cycle Component Concepts Standard Concepts (Physical) Precipitation Evaporation/Evapotranspitation Surface Water Groundwater Ecosystem & Use Related (Basin/Watershed Perspective) Green water (Terrestrial ecosystems, Crops, Wetlands) Blue water ( Throughflow, Consumptive use & return flow ) Slide 15 15 Precipitation the basic water resource GW Adapted from: GWP (M. Falkenmark), 2003, Water Management and Ecosystems: Living with Change Blue & Green Water - perspective Slide 16 16 Consumptive water use by terrestrial ecosystems as seen in a global perspective. (Falkenmark in SIWI Seminar 2001). Blue & Green Water Pathways percentages Slide 17 17 More Detailed Cycle Components Ocean Evaporation Evapo-transpiration runoff Aquifer Infiltration Recharge Evaporation Precipitation Evaporation/ET Surface Water Groundwater Slide 18 18 WHAT ARE OTHER COMPONENTS IN THE CYCLE TODAY? Slide 19 19 More Detailed Cycle Components Ocean Evaporation Evapo-transpiration runoff Water Supply Discharge treated water Salt Water Intrusion Aquifer Infiltration Recharge Evaporation Extraction Precipitation Evaporation/ET Surface Water Groundwater Soil moisture Infiltration (Art) Extraction Return flow Treated water Aquifer intrusion Soil moisture Soil moisture Slide 20 20 2. Quantification Aspects Resource Definition Scale Quantity Quality Water Use, Flowpaths & Sustainability Sectors (Agricultural, Domestic, Industrial, HydroPower, Recreation, etc) Needs, impact, strategies & tradeoffs Contamination/protection/supply security Prediction Monitoring & Evaluation Types Frequency Feedback Slide 21 21 2. Watersheds boundaries and divides ? Source: Modified from IHP-VI, 2001-ISARM Country 1 Country 2 Country 3 Slide 22 22 2. Quantification Aspects Resource (Water Resources Assessments) Scale Watershed/basin or aquifer characterization Commonly diverted/skewed ( administrative/legal boundaries) Quantity typical starting point (precipitation, surface water, groundwater) Quality (frequently 2ndary or overlooked but critical) inclusive to each user group needs Tools for prediction & maintenance Modeling Monitoring & Evaluation Slide 23 23 2. Quantification Aspects Resource Definition Scale Quantity Quality Water Use, Flowpaths & Sustainability Sectors (Agricultural, Domestic, Industrial, HydroPower, Recreation, etc) Needs, impacts, strategies & tradeoffs Contamination/protection/supply security Prediction Monitoring & Evaluation Types Frequency Feedback Slide 24 24 2. Quantification Aspects Resource Definition Scale Quantity Quality Water Use, Flowpaths & Sustainability Sectors (Agricultural, Domestic, Industrial, HydroPower, Recreation, etc) Impact, Strategies & tradeoffs Contamination/protection/supply security Prediction Monitoring & Evaluation Types Frequency Feedback Slide 25 25 3. Ground Water Comments Special considerations: Supply sources are not as temporal as surface waters commonly more stable both from a quality and quantity viewpoint Consistent good quality with low treatment costs Widespread availability away from river courses (in good host rock & climatic settings) Practical expansion and development pathway augmented as needed Can be independently developed in its early stages of development Slide 26 26 3. Ground Water Comments Slide 27 27 3. Ground Water Comments Abstraction Slide 28 28 3. Ground Water Comments reversible Increased cost Springflow reduction Ecosystem stress irreversible Salinisation Subsidence Slide 29 29 3. Ground Water Comments Slide 30 30 3. Ground Water Comments Slide 31 31 3. Data Bases Input/Output/Storage Access Links Quality considerations THE MEXICO EXAMPLE Courtesy of Dr. Philippe Arreguin Slide 32 32 Discussion Content Slide 33 Managing Water Resources Changing Hydrologists Role & Responsibility I NTEGRATED W ATER R ESOURCES M ANAGEMENT Slide 34 34 Key Hydrology Re-thinking Areas 1.Balance supply/demand the approach 2.The ecosystem 3.Management boundaries 4.Alternatives - use & supply 5.Innovative practices 6.Water & economics relations 7.Communication 8.Education 9.Conflict management Slide 35 35 2 1 3 4 5 6 4 5 6 PARTICIPATORY CONVERGENCE 1. How we address supply & demand by process ? Slide 36 36 2. The ecosystem where the water is ! BOGS AQUIFERS Slide 37 37 Waters in the past have rarely been managed at basin or aquifer scales. WHY?? - Politics and power structures - Professional & Institutional jealousy - Turf - donor/funding/research/grants - Laws (archaic and intransigent) 3. Basin & aquifer boundaries: real or political ? Slide 38 38 3. Basin & aquifer boundaries: real or political ? CONCLUSIONS: 1)Actively challenge non-hydrologic boundaries. 2)Ground and surface water boundaries can differ. Country 1 Country 2 Country 3 Slide 39 39 4. Alternatives: Re-use & conservation Water reuse stigma over effluents: success fundamentals openly addressed. show where & how it can be applied without risk. Water conservation has minimal appeal in developed countries (perceived as a no need issue). commonly dismissed & little academic interest. not a fundable research area except post-crises (to see how LA reacts to its 22% cutback). Water minimization in industry and agriculture: are there economic/political/societal incentives ? Slide 40 40 4. Alternatives: Re-use & conservation S till need to look at: depicting impacts of widely ranging solutions, non-traditional alternatives in crops, locations of planned population and industrial development. CONCLUSION: 1.Incorporate re-use & conservation 2.Develop supply & use alternatives in our solutions. Slide 41 41 5. Innovative practices, equipment & technology Each water sectors experts should address emerging innovative practices, equipment & technology that could optimize the resource. clean water from solar-powered water pumps RESULT Slide 42 42 5. Innovative practices, equipment & technology Case history Water Use Reduction, Equipment Technology 1.Total water reduced 20% 2.Drinking water reduced 70% 3.Water cost saving ~$500K/yr 4.Wastewater reduced 20% 5.Heading to: -Zero-discharge -Zero drinking water use BP Australia Perth Refinery Slide 43 43 Discussion Content 1.Cycle Component Concepts (10) Standard/Conventional Ecosystem, use related Catchment/Aquifer based Q? What is the size of your water management basin? Is there a large variability in the precipitation in your region? Q? how many of you are aware of the water balance and its variations in your setting? Q? Is ground water present/important in your setting? Is it considered as a water supply source? Q? Is surface water present/important in your setting? Is it used as a water supply source? Q? Are the aspects of blue and green water discussed related to ecosystems and the hydrologic cycle pathways Q? When dealing with watermanagement issues are the aspects of hydrologic boundaries considered or are they administrative 2.Quantification Aspects (30) Resource Definition Q? Is ground water well quantified in your setting as a resource ? as a used as a water supply source Q? Is surface water well used as a water supply source Water Use, Flowpaths & Sustainability Monitoring & Evaluation 3.Data Bases (10) Quality ???? Input/Output/Storage Access Links 4.Conclusions(10) ? how many of you are aware of the water balance and its variations in your setting?