water resources planning

download water resources planning

of 15

  • date post

    12-Apr-2017
  • Category

    Documents

  • view

    119
  • download

    0

Embed Size (px)

Transcript of water resources planning

  • WATER RESOURCES

    PLANNING

    CLIMATE CHANGE AND ITS EFFECT ON

    WATER RESOURCES

  • Is Climate Change Real?

    Yes, and it is happening

    Who Responsible For This?

    Human

  • What Is Climate Change?

    The Rise In Average Surface Temperatures On Earth, Mostly Due To The Burning Of Fossil Fuels

    Result From Either Natural Factors Or Human Activities - refers To Any Significant Change In Weather Patterns Lasting For An Extended Period Of Time, Typically 30 Years Or Longer

  • How Climate Change

    Happen?

    Burning Of Fossil Fuels

    Agriculture

    Deforestation

    Some Quantities Of These Gases

    Are A Naturally Occurring

  • Vulnerability Of Water

    Resources To Climate Change

    Changes to water supplies

    Increased amounts of

    water pollution

    Risks to water & wastewater infrastructure & operations

    Degradation of watersheds

    Ocean acidification

    Multiple impacts in

    coastal areas

  • IMPACTS

    Droughts, changing in precipitation patterns and

    snowmelt, increased evaporation cause changes

    in water availability

    Sea-level rise and salt water intrusion into

    groundwater aquifers

    Warmer air temperature create increased demand

    for water

    MANAGEMENT CHALLENGES

    Costs to find alternative water supplies

    Encouraging customer to support water conservation

    Need to develop non traditional water supplies

    Increased competition for stressed water supplies

    CHANGES TO WATER SUPPLIES

  • INCREASED WATER POLLUTION

    IMPACTS

    Warmer water holds less oxygen, increasing instances of low oxygen levels

    More storm water runoff and sewer overflows, carrying pollutants to waterways, and causing erosion and sedimentation

    Dry periods and drought, lowering stream flow and reducing waterways ability to handle pollutant discharges

    MANAGEMENT CHALLENGES

    Ensuring pollutants discharges meet CWA water quality goals

    Controlling flooding and sewer overflows

    Protecting in stream flows and water temperatures to pressure biodiversity

    Overcome barriers to adopting green infrastructure practices

  • RISKS TO INFRASTRUCTURE & OPERATIONS

    IMPACTS

    Expanded flood hazard areas, risking damage to water treatment

    infrastructure

    Damage to distribution and collection pipelines due to both drier soils and

    erosion from storm

    Operations of water treatment system complicated by unusual changes in

    temperature. Flows, sedimentation, salt water intrusions, etc.

    MANAGEMENT CHALLENGES

    Aging infrastructure and population growth combined with climate risks

    Paying for maintenance and operations, responding to emergencies, and

    conducting long term climate planning

    Adopting finance policies and risk assessment tools that can be integrated

    into asset management plans

    Investing in emergency planning and long term risk management

  • WATERSHED DEGRADATION

    IMPACTS

    Changes in precipitation and increased evaporation are likely to change flows to lakes and streams, affecting the extent and quality of wetlands, lakes, and estuaries

    Declining groundwater levels due to withdrawals and reduced recharge are likely to reducestream flows

    Temperature and other changes will affect habitat for certain species, such as cold-water fish

    MANAGEMENT CHALLENGES

    Protecting healthy and intact watersheds

    Restoring ecological integrity of waters already under stress from urbanization

    Maintaining ecosystem services provided by watersheds and wetlands

  • OCEAN ACIDIFICATION

    Ocean become 30% acidic at rate 10 of 100 times greater than pre-industrial times

    Affects shellfish and coral reefs, contributing to economic impacts

    Combined with other reasons, 75% of worlds coral reefs are threatened

    IMPACTS

    Understanding the ecological and economic impacts of acidification

    Reducing land and air sources of pollutants that exacerbate acidification

    Finding ways to protect shellfish, coral reefs, and other sensitive organisms

    MANAGEMENT CHALLENGES

  • COASTAL IMPACTS

    IMPACTS

    Rising sea levels moving shorelines by inundating lowlands, displacing wetlands, and altering tidal rangesStorm surges, combined with sea-level rise, increasing the areas subject to periodic inundation and saltwater intrusion into groundwater andWater pollution and increased absorption of carbon dioxide creating coastal zone hotspots of acidification and hypoxia

    MANAGEMENT CHALLENGES

    Finding optimum strategies for retrofitting, protecting or moving infrastructure

    Communicating risk to residents in vulnerable areas

    Protecting habitats sea levels rise