1 / 17

BERVIE WATER – PROPOSALS FOR A CATCHMENT SCALE STUDY

BERVIE WATER – PROPOSALS FOR A CATCHMENT SCALE STUDY. Esk rivers & fisheries trust. catchment OBJECTIVES. Biological assessment Hydrological assessment Geomorphological assessment. INVERTEBRATE IDENTIFCATION. KICK SAMPLING. FISH MEASURED. ELECTRIC FISHING. BIOLOGICAL ANALYSIS.

lumina
Télécharger la présentation

BERVIE WATER – PROPOSALS FOR A CATCHMENT SCALE STUDY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BERVIE WATER – PROPOSALS FOR A CATCHMENT SCALE STUDY Esk rivers & fisheries trust

  2. catchment OBJECTIVES • Biological assessment • Hydrological assessment • Geomorphological assessment

  3. INVERTEBRATE IDENTIFCATION KICK SAMPLING FISH MEASURED ELECTRIC FISHING

  4. 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

  5. PROPORTION SEDIMENT SENSITIVE INVERTEBRATES (PSI) PSI = ∑Scores for sediment sensitive groups (Highly& Moderate)/ ∑Scores for all sediment sensitive groups PSI River Bed condition 100-81 Minimally sedimented/unsedimented 80-61 Slightly sedimented 60-41 Moderately sedimented 40-21 Sedimented 20-0 Heavily sedimented

  6. 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

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

  8. EVIDENCE OF RECENT CANALISATION

  9. Erosion on the Lower Bervie

  10. SEPA FLOOD MAP 1:200 YEAR EVENT

  11. MAJOR FLOOD DECEMBER 2012

  12. MOUTH OF THE BERVIE WATER NO EASY SOLUTION!

  13. ALWAYS LOOKING FOR VOLUNTEERS! THANK YOU

More Related