Examples on GIS application in climate adaption & river basin management

Transcription

1 Examples on GIS application in climate adaption & river basin management KRISTIAN VESTERGAARD M.Sc. Ph.D m.ida UNI VERSITy

2 KRISTIAN VESTERGAARD M. Sc. study (Environmental Engineering) at University of Aalborg Ph.D study (Modelling of Streams) at University of Aalborg Assistant professor at University of Aalborg Development of training programmes at The Freshwater Centre, Silkeborg External lecturer at University of Aalborg Manager, Training and Project Department, The Freshwater Centre, Silkeborg External lecturer, Engineering College of Aarhus Hydraulic expert at Orbicon, Aarhus Consultant, KV MiljøFormidling Associated professor, Aarhus University, ASE Foto: Bo Jarner

3 AU SCHOOL OF ENGINEERING 1. January 2012 IHA became a member of the AU family 3 engineering depart: Engineering School, Engineering Institute, AU Herning Bachelor of engineering (10 different main subjects) Master of Science Engineering (8 master programmes) Approx students Located at Dalgas Avenue (from 2014 Navitas), Katrinebjerg, Gustav Wieds Vej/Hangøvej and Herning

4 URBAN WATER semester: Basic civil/construction engineering 4. semester: Climate adaption 5. semester: Internship semester: Water supply and waste water (UK) 7. semester: Bachelor project

5 A RAINY DAY IN US

6 CLIMATE CHANGE MORE RAIN

7 CLIMATE ADAPTION PLANNING 2007: Flooding in Greve 2011: Flooding in Copenhagen 2012: Flooding in Lystrup Task Force for climate adaption Climate adaption plan

8 MIKE URBAN & MIKE FLOOD Flood map DHM: Danish Elevation model

9 FLOOD MAP + VALUE MAP = FLOOD RISK MAP x =

10 EU DIRECTIVE ON: ASSESSMENT AND MANAGEMENT OF FLOOD RISK Adopted by EU in 2007 Planning in progres in DK In the future it will be pretty easy to make a world map

11 EU WATER FRAME DIRECTIVE Water frame directive was adopted by EU in 2000 DK still wait for the first river basin management plan

12 MAINTENANCE OF STREAMS One of the tools to reach the objectives for streams is changed maintenance Changed often equals reduced Higher water level in the stream Areas near the stream will get more wet Farmers will earn less on these areas They have to be compensated for this

13 HYDRAULIC MODELLING 1. Set up a hydraulic model 2. Choose a flow scenario 3. Estimate the hydraulic resistance (Manning number) at the present maintenance practice 4. Calculate the water level along the stream 5. Estimate the hydraulic resistance (Manning number) after the change in maintenance practice 6. Calculate the water level along the stream

14 ESTIMATING DRAINAGE CONS. 1. Setup an elevation model 2. Transfer the water levels in the stream to GIS 3. Extend these water levels to the terrain (eg. Vertical Mapper) 4. Subtract surface and water levels 5. This will give the depth of the unsaturated zone 6. This depth will determined which crops can grow at the area 7. And this will lead to the outcome

15 UNSATURATED DEPTH MAP Present depth of the unsaturated zone Changed maintenance scenario A Changed maintenance scenario B

16 CONSEQUENSE MAP x Combining the present unsaturated depth map with the future unsaturated depth map a map showing the consequenses of the changed maintenance can be made. This consequense map will form the basis for calculation of economical compensation to the farmer The method is being tested at the moment by DCE/AU