BERVIE WATER – PROPOSALS FOR A CATCHMENT SCALE STUDY ESK RIVERS & FISHERIES TRUST.

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Presentation transcript:

BERVIE WATER – PROPOSALS FOR A CATCHMENT SCALE STUDY ESK RIVERS & FISHERIES TRUST

CATCHMENT OBJECTIVES BIOLOGICAL ASSESSMENT HYDROLOGICAL ASSESSMENT GEOMORPHOLOGICAL ASSESSMENT

KICK SAMPLING INVERTEBRATE IDENTIFCATION ELECTRIC FISHING FISH MEASURED

BIOLOGICAL ANALYSIS COMMUNITIES OF INVERTEBRATES HIGHLIGHT THE ON-GOING RIVER FUNCTIONS DETECTS IMPACTS and ECOLOGICAL STATUS Pollution, acidification, eutrophication, and metals Score the invertebrates according to presumed sensitivity Biological Monitoring Working Party (BMWP) – based on families Ephemeridae (May Flies), Perlidae (Stone flies) – score 10 Caenidae (angler’s curse) – score 7 Gammridae (shrimps) - score 6 Baetidae (olives) - score 4 Hirudidae (leeches) - score 3 Chironomidae (midge larva) – score 2 Oligochaeta (worms) - score 1 Proportion Silt Sediment Sensitive Invertebrates – alternative to quantifying the volume of deposited fine sediment (<2mm) in the river bed

PROPORTION SEDIMENT SENSITIVE INVERTEBRATES (PSI) PSI = ∑Scores for sediment sensitive groups (Highly& Moderate)/ ∑Scores for all sediment sensitive groups PSIRiver Bed condition Minimally sedimented/unsedimented 80-61Slightly sedimented 60-41Moderately sedimented 40-21Sedimented 20-0Heavily sedimented

HYDROLOGICAL ASSESSMENT AVERAGE RIVER FLOWS ACROSS SCOTAND HAVE INCREASED BY ~ 20% OVER THE LAST 30 YEARS AFFECTING RIVER BANK EROSION FLOODING IN-STREAM HABITAT INCREASED SEDIMENT TRANSPORT Erosion downstream of Mondynes Siltation at Tipperty

An example of the use of LIDAR data in a ground model mapping stream power

EVIDENCE OF RECENT CANALISATION

Erosion on the Lower Bervie

SEPA FLOOD MAP 1:200 YEAR EVENT

MAJOR FLOOD DECEMBER 2012

MOUTH OF THE BERVIE WATER NO EASY SOLUTION!

ALWAYS LOOKING FOR VOLUNTEERS! THANK YOU