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Invest 2.2.1 Hydropower Production model. Yonas Ghile. Talk Overview. Why care about ecosystem services InVEST Hydropower production Model Hands-on Exercise. Why Care About Ecosystem Services?. InVEST : Science in a Simple Tool.

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Presentation Transcript
slide1

Invest 2.2.1

Hydropower Production model

YonasGhile

slide2

Talk Overview

  • Why care about ecosystem services
  • InVEST
  • Hydropower production Model
  • Hands-on Exercise
slide4

InVEST: Science in a Simple Tool

Integrated Valuation of Ecosystem Services and Tradeoffs

slide5

InVEST Attributes

  • Evaluate change
  • Biophysical & monetary
  • Open source
  • Multiple services
  • Spatially explicit
  • Production functions

Models

Simple

Complex

Data

Tier 0

Tier 1

Tier 2

Tier 3

slide6

Water Yield for

Hydropower

Irrigation

Drinking Water

Water Yield

Pollution Dilution

slide7

Questions you get answers

  • How much water is available?
  • Where does the water used for hydropower production come from?
  • How much energy does it produce?
  • How much is it worth?
slide8

Informs Policy Makers to

  • Focus protection on areas that contribute the most.
  • Design management practices that lead to minimal loss.
  • Identify places where other economic activities will conflict with hydropower production.
  • How much hydropower will we gain or lose under future management or conservation plans?
  • Create payment programs to get most return on investment (with Tier 2 model).
slide9

Model Architecture

Land Use

Climate

Soils

Water Yield Model

E(t)

P(t)

Evapo-transpiration

Water Yield

Price

Turbine

Eff.

Dam Height

Consumptive Use

Q(t)

Net Volume

Hydropower and Valuation Model

Water Scarcity Model

Energy

Energy Value

slide10

Water Yield

Transpiration

Precipitation

Evaporation

Rain

Leaf type

Snow

Plant type

Seasonality

Fog

Yjx

Root depth

Inflow

annual average water yield per pixel

Water Availability

slide12

$####.##

Valuation

slide13

Model Strengths

  • Uses readily available and minimum data.
  • Simple, applicable and generalizable
  • Spatially explicit
  • Link the biophysical functions to economic values
  • Values each parcel on the landscape
slide14

Model Limitations

  • Neglects extremes and seasonal variation of water yield
  • Neglects surface-deep groundwater interactions
  • Assumes hydropower production and pricing remain constant
slide15

Calibration and Validation

  • Sensitivity Analysis to identify most sensitive parameters
  • Model Calibration using long term average actual data
    • Find land use parameters within acceptable ranges
    • Model parameter (Zhang constant)
  • Validate Model by conducting comparisons with observed data or other model output
slide19

And Many Other Sites

West Coast

East Coast

Hawai’i

Belize

China

Colombia

Uganda

Mexico

Ecuador

Amazon Basin

Tanzania

Indonesia

slide20

Hands-on Session

  • Run the water yield model
slide21

Hands-on Session

  • Run the water scarcity model
slide22

Hands-on Session

  • Run the hydropower and valuation model
slide23

Hands-on Session

Think how you would use theWater Yield Model in your work?

slide24

Coming up in InVEST

  • Regionalizing the Zhang constant
  • Automating calibration technique
  • Monthly model
  • Groundwater recharge index
  • Tier 2 water yield model

I(t)

P(t)

Irr(t)

Sm(t)

Qf(t)

E(t)

If(t)

S(t)

Bf(t)

how does it work
How Does it Work?
  • Water Yield is the water depth (volume) that is NOT Evapotranspired: WY = P – AET
  • It is the sum of Surface flow, subsurface flow and groundwater flow: WY = SR + SubSR + GW
  • Model: WY = P * (1 – AET / P )

E(t)

P(t)

Q(t)

energy calculation
Energy Calculation

outflow rate

head

pd = d.qd.g.hd

gravity constant

water density

outflow

=0.00272

valuation
Valuation
  • Total Value of the Hydropower:
  • The Sub-basin’s Hydropower production Value:

=

data requirements
Data Requirements

Inputs

Process

Outputs

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