Schneider & Jorde Ecological Engineering Habitat Model CASiMiR Silke Wieprecht and Ianina Kopecki

Preference functions Flow velocity Substrate indexWater depth Habitat prefernces of brown trout adult

Classical preference approach Habitat preferences Water depth Flow velocity substratum Suitability index SI Water depth Flow velocity Substrate type Morphology/Hydraulics Habitat suitability

Classical preference approach Morphology/Hydraulics Habitat suitability Water depth Flow velocity Substrate type Single element d= 0,32 m v = 0,8 m/s sub =5 SI d =0,5 SI v =1,0 SI sub =0,4

Total habitat suitability Arithmetic mean Product Geometric mean

Fuzzy sets and rules  Available Knowledge is imprecise (fuzzy), multivariate und rivertype specific IF water depth „High“ AND substratum size „medium“ THEN Habitat suitability „High“ AND flow velocity „medium“ Flow velocity v [m/s] Membership degree [-] 0.5 m/s small medium high m/s belongs by 75% to „medium“; but also by 25% to „high“flow velocities Fuzzy-sets can be adapted rivertype specifically

Flow velocity Substratum size Water depthHabitat sutability Fuzzy sets and rules

CASiMiR approach Water depth Flow velocity Substratum Morphology/Hydraulics high low medium Habitat suitabilityExpert knowledge 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“ IF Water depth.... AND Flow velocity AND Substratum THEN Suitability

Flow regulation problem -minimum flow for diversion type HPP note: env 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 quality for brown trout (adult)

adultsubadultjuvenilefryspawn 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 ~ 1000 l/s~ 500 l/s~ 3000 l/s Integrated habitat suitability Habitat availability [%] Areas of the same quality [m²]

PeriodMinimum Instream Flow 1. Jan Feb3,0 m³/s 1. Mrz Apr3,5 m³/s 1. Mai - 31.Okt1,8 m³/s 1.Nov Jan3.0 m³/s Adapted MIF regulation Recommended discharge [m³/s] MIF depending on species (and life stages‘ requirements)

Morphologic enhancements Suitability for grayling adult, river Murg (Black Forest)

CASIMiR-GIS ArcGIS Toolbox (ESRI ArcGIS Desktop 9.3) for fuzzy-logic based habitat modelling

Flexible fuzzy-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 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

Base versions of habitat and hydropower models  free for download Website and SHARE-website