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County of Hawaii Department of Water Supply Water Use & Development Plan Update Integrating Water Law and Land Use Planning in Hawaii Big Island Water.

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Presentation on theme: "County of Hawaii Department of Water Supply Water Use & Development Plan Update Integrating Water Law and Land Use Planning in Hawaii Big Island Water."— Presentation transcript:

1 County of Hawaii Department of Water Supply Water Use & Development Plan Update Integrating Water Law and Land Use Planning in Hawaii Big Island Water Resources Meeting - UH Hilo March 21, 2011 Lawrence E. Beck, P.E.

2 HAWAII WATER PLAN Legislative Mandate 1987 – Hawaii Water Code (HRS Chapter 174C) 1987 – Hawaii Water Code (HRS Chapter 174C) Protect Hawaiis surface & ground water resources Protect Hawaiis surface & ground water resources Established the Commission on Water Resources Management (CWRM) Established the Commission on Water Resources Management (CWRM) Development of the Hawaii Water Plan as…a long range planning guide for CWRM Development of the Hawaii Water Plan as…a long range planning guide for CWRM

3 HAWAII WATER PLAN WRPPWQPSWPPAWUDP County WUDPs State Needs Agricultural Needs Water Use & Land Use Policies Quantity Quality Resource Protection Policies

4 HAWAII WATER PLAN County WUDPs Objective – to set forth the allocation of water to land use through the development of policies & strategies to guide the County in its planning, management and development of water resources to meet projected demandsto set forth the allocation of water to land use through the development of policies & strategies to guide the County in its planning, management and development of water resources to meet projected demands Hawaii County decided to fund the update – recognized its importance as a long range planning guide for DWS

5 Statewide Framework (2000) Objective Created by CWRM to facilitate the coordination, integration & consistency of the components of the Hawaii Water Plan

6 Technical Approach Key Tasks Inventory of Existing Sources Inventory of Existing Sources Inventory of Existing Uses Inventory of Existing Uses Identification of Existing Water Systems Identification of Existing Water Systems Assessment of Land Use Plans & Policies Assessment of Land Use Plans & Policies Projection of Future Water Demands Projection of Future Water Demands Identification of Supply-side (Resource) & Demand-side (Uses/Control) Options Identification of Supply-side (Resource) & Demand-side (Uses/Control) Options Public Participation – Stakeholder Input/Review Public Participation – Stakeholder Input/Review

7 Technical Approach Inventory of Existing Sources CWRM database CWRM database –Registered Wells –Registered Diversions Updated well pumpage information/records Updated well pumpage information/records Updated diversion records Updated diversion records Catchment systems are major sources Catchment systems are major sources Reclaimed wastewater Reclaimed wastewater Desalination systems Desalination systems

8 Sustainable Yield Instream Flow Standard

9 Technical Approach Key Definitions Sustainable Yield Sustainable Yield –Sustainable yield means the maximum rate at which water may be withdrawn from a water source without impairing the utility or quality of the water source as determined by the commission. Instream Flow Standards Instream Flow Standards –a quantity or flow of water or depth of water which is required to be present at a specific location in a stream system at certain specified times of the year to protect fishery, wildlife, recreational, aesthetic, scenic, and other beneficial instream uses.

10 CWRM Aquifer Sectors & Systems 801 – KOHALA 806 – SW MAUNA LOA 803 – W MAUNA KEA 807 – NW MAUNA LOA 809 – HUALALAI 804 – NE MAUNA LOA KILAUEA 802 – E MAUNA KEA 805 – SE MAUNA LOA 24 Systems

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12 Summary – Island of Hawaii Aquifer Sector – Sustainable Yield Sector Code Aquifer Sector Area (Acres) S.Y. (mgd) 801Kohala154, East Mauna Kea 385, West Mauna Kea 180, North East Mauna Loa 256, South East Mauna Loa 447, South West Mauna Loa 406, North West Mauna Loa 186, Kilauea361, Hualalai200,28256 Total – Island of Hawaii 2,579,

13 CWRM Registered Wells & Aquifer Sectors

14 CWRM Watersheds & Registered Diversions Aquifer Sectors

15 Technical Approach (cont.) Inventory of Existing Uses Domestic (individual households) Domestic (individual households) Industrial (fire protection, mining, thermoelectric cooling, geothermal) Industrial (fire protection, mining, thermoelectric cooling, geothermal) Irrigation (golf course, landscaping) Irrigation (golf course, landscaping) Agriculture (crops, processing, livestock) Agriculture (crops, processing, livestock) Military Military Municipal (County, State, Private Public Water Systems) Municipal (County, State, Private Public Water Systems)

16 Technical Approach Land Use Plans & Policies State Land Use Classifications State Land Use Classifications –Generalized Land Use Policies County General Plan County General Plan –Ultimate Development County Vision County Zoning County Zoning –Allowable Development by Ordinance

17 Land Use Pattern Allocation Guide Map (LUPAG Map) Classifications

18 County of Hawaii General Plan (LUPAG) 12 Classifications

19 County of Hawaii Zoning Map About 100 Zone Types

20 Technical Approach Projected Water Demands Full Build-out Scenarios Full Build-out Scenarios –Sustainability of Land Use Policies –Application of Standard Unit Rates to GP/Z Water Demand Projections Water Demand Projections –Infill of undeveloped or under-developed lands –Based on Population Growth Scenarios –Source Availability attenuates Development –Water System Infrastructure restricts Development –DWS treats State, County, DHHL, etc. same as other developers with respect to availability & infrastructure

21 GENERAL PLAN (LUPAG) FULL BUILD-OUT SCENARIO EXISTING ZONING BUILD-OUT SCENARIO PROJECTED WATER DEMAND SUSTAINABILITY OF LAND USE POLICIES EXISTING DEMAND SUSTAINABLE YIELD (WRPP) DEMAND/SUSTAINABLE YIELD (MGD)

22 SUSTAINABLE YIELD (WRPP) EXISTING ZONING BUILD-OUT SCENARIO SUSTAINABILITY OF LAND USE POLICIES GENERAL PLAN (LUPAG) FULL BUILDOUT SCENARIO DEMAND/SUSTAINABLE YIELD (MGD)

23 SUSTAINABLE YIELD (WRPP) EXISTING ZONING BUILD-OUT SCENARIO SUSTAINABILITY OF LAND USE POLICIES GENERAL PLAN (LUPAG) FULL BUILDOUT SCENARIO DEMAND/SUSTAINABLE YIELD (MGD)

24 GENERAL PLAN (LUPAG) FULL BUILD-OUT SCENARIO EXISTING ZONING BUILD-OUT SCENARIO PROJECTED WATER DEMAND PROJECTED POPULATION GROWTH PROJECTED DEMAND EXISTING DEMAND DEMAND (MGD) EXISTING POPULATION POPULATION

25 Technical Approach Identification of Resource Options Conventional Water System Infrastructure Conventional Water System Infrastructure Alternative Water Resource Measures Alternative Water Resource Measures –Desalination –Reclaimed Water Demand-side Measures Demand-side Measures –Conservation Programs – Affects Energy Usage –Xeriscape/Landscape management –Reduced Development Density - occurring –Water Availability Ceilings

26 Challenges Limited Information Based on the best available data Based on the best available data Source information from WRPP not available early in the process & WQP not yet updated Source information from WRPP not available early in the process & WQP not yet updated Agricultural Water Use - AWUDP projections not available – not island-wide Agricultural Water Use - AWUDP projections not available – not island-wide Requires reasonable judgment & assumptions Requires reasonable judgment & assumptions

27 Challenges Opportunity to Focus Future Efforts Identification of Data Needs Identification of Data Needs –Updated Source Capabilities –Agricultural Water Requirements Identify areas requiring critical water resource management – current & future Identify areas requiring critical water resource management – current & future –Prioritize study and assessment efforts –Continue to monitor non-problem areas Linking of Land Planning Policies with infrastructure & resource availability Linking of Land Planning Policies with infrastructure & resource availability

28 Footnotes Full Build-out conditions (General Plan & Zoning) represent worst case scenarios for the study areas Full Build-out conditions (General Plan & Zoning) represent worst case scenarios for the study areas –Used for order of magnitude-type assessment of the region –Helpful in prioritizing focus of efforts Total Demand includes both potable & non-potable uses Total Demand includes both potable & non-potable uses –More evaluation of non-potable use, i.e. Agricultural use of water is required Focus on existing conditions & projected demands to prioritize efforts Focus on existing conditions & projected demands to prioritize efforts

29 Summary – Island of Hawaii Sustainable Yield – Existing & Potential Demand Code Aquifer Sector Sustainable Yield Existing Use Potable Total Projected Use 2025 Potable Total Zoning full- buildout Potable Total LUPAG full-buildout Potable Total 801Kohala East Mauna Kea West Mauna Kea North East Mauna Loa South East Mauna Loa South West Mauna Loa North West Mauna Loa Kilauea Hualalai Total Island of Hawaii

30 CWRM Aquifer Sectors & Systems 803 – W MAUNA KEA 807 – NW MAUNA LOA 809 – HUALALAI

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32 Summary – Island of Hawaii Sustainable Yield – Initial and Revised Potential Demand Code Aquifer Sector Area Sustainable Yield Zoning full build-out LUPAG full build-out InitialRevisedInitialRevised w/ ag w/o ag w/ ag w/o ag w/ ag 801Kohala East Mauna Kea West Mauna Kea North East Mauna Loa South East Mauna Loa South West Mauna Loa North West Mauna Loa Kilauea Hualalai Total Island of Hawaii

33 EXISTING WATER USE PROFILE SECTOR AREA 801 – KOHALA (MAHUKONA, HAWI, WAIMANU) 801

34 PROJECTED TOTAL DEMANDS SECTOR AREA 801 – KOHALA (MAHUKONA, HAWI, WAIMANU) SY = 154 MGD ZONING = 174 MGD LUPAG = 208 MGD PROJECTED DEMAND EXISTING USE 801

35 PROJECTED DEMANDS EXCLUDING AG DEMANDS SECTOR AREA 801 – KOHALA (MAHUKONA, HAWI, WAIMANU) SY = 154 MGD LUPAG = 40 MGD ZONING = 9 MGD PROJECTED DEMAND EXISTING USE 801

36 EXISTING WATER USE PROFILE SECTOR AREA 802 – EAST MAUNA KEA (HONOKAA, PAAUILO, HAKALAU, ONOMEA) 802

37 PROJECTED TOTAL DEMANDS SECTOR AREA 802 – EAST MAUNA KEA (HONOKAA, PAAUILO, HAKALAU, ONOMEA) SY = 388 MGD ZONING = 378 MGD LUPAG = 405 MGD PROJECTED DEMAND EXISTING USE 802

38 SY = 388 MGD EXISTING USE PROJECTED DEMANDS EXCLUDING AG DEMANDS SECTOR AREA 802 – EAST MAUNA KEA (HONOKAA, PAAUILO, HAKALAU, ONOMEA) LUPAG = 25 MGD ZONING = 8 MGD PROJECTED DEMAND 802

39 EXISTING WATER USE PROFILE SECTOR AREA 803 – WEST MAUNA KEA (WAIMEA) 803

40 PROJECTED TOTAL DEMANDS SECTOR AREA 803 – WEST MAUNA KEA (WAIMEA) SY = 24 MGD ZONING = 151 MGD LUPAG = 187 MGD EXISTING USE PROJECTED DEMAND 803

41 SY = 24 MGD EXISTING USE PROJECTED DEMAND PROJECTED DEMANDS EXCLUDING AG DEMANDS SECTOR AREA 803 – WEST MAUNA KEA (WAIMEA) LUPAG = 52 MGD ZONING = 14 MGD 803

42 General Recommendations Promote water conservation Promote water conservation Use Highest Quality Water for Highest Uses Use Highest Quality Water for Highest Uses Plan for use of Non-potable Sources & Reclaimed Water for landscape irrigation & agriculture Plan for use of Non-potable Sources & Reclaimed Water for landscape irrigation & agriculture More monitoring & studies to determine safe sustainable yields for groundwater More monitoring & studies to determine safe sustainable yields for groundwater Anticipate status quo use of stream diversions until determination of instream flow standards Anticipate status quo use of stream diversions until determination of instream flow standards

43 Recommendations Sector 803 – West Mauna Kea Develop basal groundwater for potable water sources with caution, considering the thin basal lens Develop basal groundwater for potable water sources with caution, considering the thin basal lens Investigate alternative sources of potable water, including transfer of water from the Kohala Aquifer Sector Area, surface water sources, desalination of brackish basal water Investigate alternative sources of potable water, including transfer of water from the Kohala Aquifer Sector Area, surface water sources, desalination of brackish basal water Implement demand side conservation measures Implement demand side conservation measures Investigate the feasibility of non-potable water systems (reclaimed water) in areas with concentrated development, such as the resort complexes Investigate the feasibility of non-potable water systems (reclaimed water) in areas with concentrated development, such as the resort complexes

44 Implementation Plan DWS 20-year Water Master Plan (completed) DWS 20-year Water Master Plan (completed) –Implementation strategy for DWS systems –Development of 20-year CIP Integration with Department of Planning Policies Integration with Department of Planning Policies –Community Development Plans Pursue Regional Assessment of Available Water Resources (West Hawaii) Pursue Regional Assessment of Available Water Resources (West Hawaii) –Hualalai –West Mauna Kea –Northwest Mauna Loa

45 CWRM Aquifer Sectors & Systems NEW USGS STUDY RECHARGE DIFFERENCE RELATIVE TO WRPP % CHANGES

46 Final WUDP Update Report is available on the DWS website: About the Water Water Use and Development Plan Update

47 Questions? or Mailing Address: Mr. Lawrence Beck, PE County of Hawaii Department of Water Supply 345 Kekuanaoa Street Hilo, Hawaii 96720


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