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Habitat Model CASiMiR. Silke Wieprecht and Ianina Kopecki. Preference functions. Habitat prefernces of brown trout adult. Flow velocity. Substrate index. Water depth. Classical preference approach. Morphology/Hydraulics. Habitat preferences. Habitat suitability. Water depth.

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habitat model casimir

Habitat Model CASiMiR

Silke Wieprecht and Ianina Kopecki

preference functions
Preference functions

Habitat prefernces of brown trout adult

Flow velocity

Substrate index

Water depth

classical preference approach
Classical preference approach

Morphology/Hydraulics

Habitat preferences

Habitat suitability

Water depth

Water depth

Flow velocity

Flow velocity

Suitability index SI

Substrate type

substratum

classical preference approach1
Classical preference approach

Morphology/Hydraulics

Habitat suitability

Water depth

SId=0,5

Flow velocity

SIv=1,0

Substrate type

SIsub=0,4

Single element

d = 0,32 m

v = 0,8 m/s

sub = 5

total habitat suitability
Total habitat suitability

Product

Arithmetic mean

Geometric mean

fuzzy sets and rules
Fuzzy sets and rules

Flow velocity

small

high

medium

1

0.8

0.75

Membership degree [-]

0.6

0.4

0.25

0.2

0

0.5 m/s

0

0.4

0.8

1.2

v [m/s]

0.5 m/s belongs by 75% to „medium“;

but also by 25% to „high“flow velocities

 Available Knowledge is imprecise (fuzzy), multivariate und rivertype specific

IF water depth „High“

AND substratum size „medium“

AND flow velocity „medium“

THEN Habitat suitability „High“

Fuzzy-sets can be adapted rivertype specifically

fuzzy sets and rules1
Fuzzy sets and rules

Substratum size

Flow velocity

Water depth

Habitat sutability

casimir approach
CASiMiR approach

Morphology/Hydraulics

Expert knowledge

Habitat suitability

Water depth

IF Water depth „High“

AND Flow velocity „Medium“

AND Substratum size „High“

THEN Suitability „Very High“

IF Water depth „Medium“

AND Flow velocity „Medium“

AND Substratum size „High“

THEN Suitability „High“

Flow velocity

IF Water depth ....

AND Flow velocity ......

AND Substratum .........

THEN Suitability ........

.

.

.

low

Substratum

medium

high

flow regulation
Flow regulation
  • problem

- minimum flow for diversion type HPP

note:

env. 5500 HPP in Germany

  •  almost all rivers affected by hydropower
  • methods
    • statistic flow based approaches (e.g. 1/3 MNQ)
    • hydromorphologic thresholds (e.g. minimum flow velocities, minimum water depth)
    • habitat modeling as decision support
habitat suitability as criterion
Habitat suitability as criterion

Habitat quality for brown trout (adult)

integrated habitat suitability
Integrated habitat suitability

adult

subadult

juvenile

fry

spawn

Flow rate with max WUA

~ 9000 l/s

~ 7000 l/s

~ 3000 l/s

~ 500 l/s

~ 9000 l/s

Flow rate with 50% of max WUA

~ 1800 l/s

~ 1800 l/s

~ 1000 l/s

~ 500 l/s

~ 3000 l/s

Areas of the same quality [m²]

Habitat availability [%]

adapted mif regulation
Adapted MIF regulation

Period

Minimum Instream Flow

1. Jan - 29. Feb

3,0 m³/s

1. Mrz - 30. Apr

3,5 m³/s

1. Mai - 31.Okt

1,8 m³/s

1.Nov - 31. Jan

3.0 m³/s

MIF depending on species (and life stages‘ requirements)

Recommended discharge [m³/s]

morphologic enhancements
Morphologic enhancements

Suitability for grayling adult, river Murg (Black Forest)

casimir gis
CASIMiR-GIS

ArcGIS Toolbox (ESRI ArcGIS Desktop 9.3) for fuzzy-logic

based habitat modelling

casimir gis features
Flexiblefuzzy-logic calculation module combined

with native ESRI ArcGIS functionalities

Integration of additional parameters

(e.g. substrate),

data transformation

Visualisation and reporting

Data analysis

Model Builder

CASIMiR-GIS features
conclusions
Conclusions

CASiMiR approach includes impreciseness of ecological knowledge and allows to account for interaction of habitat parameters

Easy to understand and close to ecological reasoning approach

Wide spectrum of applications: MIF, river restoration, effects of hydropeaking

CASiMiR-GIS offers high flexibility in parameter definition

Habitat modelling helps to find a compromise between economic needs and ecological functionality

slide17

Website www.casimir-software.de

and SHARE-website

Base versions of habitat and hydropower models

 free for download

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