Pramod Surendran-Water-operations-in-urban-rural-areas-permits-investigations-technical-measures-and-monitoring

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This document discusses water operations in urban and rural areas, including permits, investigations, technical measures, and monitoring. It presents a case study that uses hydrogeological reference conditions (HRCs) based on geological history and maps to assume the subsurface conditions at different locations. Borehole data is then used to confirm or reject the assumed HRCs. For two example locations, the assumed HRCs based on maps were confirmed by borehole data. The use of HRCs is concluded to be a promising method for planning water operations as it provides flexibility, considers depth, and allows for integration across disciplines.

Presentations & Public Speaking

WATER OPERATIONS IN URBAN / RURAL AREAS: PERMITS,
INVESTIGATIONS, TECHNICAL MEASURES AND MONITORING
Pramod Surendran
Supervisor: Åsa Fransson, Co-Supervisor: Mark Johnson,
Examiner: Roland Barthel

CONTENTS
• Introduction
• Case study area
• Methods and materials
– Assumptions of Hydrogeological Reference Conditions, HRCs based on
geological history and cartographic studies
– Confirmation or rejection based on borehole data
• Conclusions

HYDROGEOLOGICAL REFERENCE CONDITIONS, HRCs
Reference Condition (HRC) 1
Crystalline bedrock
HRC 2
Glacial till HRC 4
Wave washed deposits
HRC 3
Glaciofluvial deposits
HRC 5
Clay covered areas

WHAT IS A WATER OPERATION?
• Groundwater discharge
Extraction of groundwater from subsurface to the surface (pumping).
• Groundwater recharge
Introduce infiltration process.
• Permit from Environmental court

WHAT DO WE NEED TO PROTECT ?
• Energy wells
• Natural environment
• Cultural environment
• Buildings and infrastructure facilities
• Water supplies

ENVIRONMENTAL IMPACTS
• Lowering of groundwater (GW) level
• Settlements
• Settlements and damage to buildings around/near construction area
• Damage to Ecosystem
• Technical, protective and monitoring measures needed to fullfill the permit from
environmental court.

CASE STUDY AREA
• 80 km south
• Varberg to Hamra
• Blue stretch
• Yellow stretch

METHODS AND MATERIALS
• Assumptions of HRCs based on geological history and cartographic studies
• Confirmation or rejection based on borehole data

GEOLOGICAL HISTORY AND CARTOGRAPHIC STUDIES
Topography map Quaternary deposits map Bedrock map

GEOLOGICAL HISTORY AND CARTOGRAPHIC STUDIES
Shoreline map Depth to Bedrock map

EXAMPLES LOCATION 2 (L2) AND LOCATION 4 (L4)
• L2 – HRC2
• L4 – HRC4
Quaternary deposits map

ASSUMED HRCs FOR LOCATION L2 AND L4
Reference Condition (RC) 1
Crystalline bedrock
HRC 2
Glacial till HRC 4
Wave washed deposits
HRC 3
Glaciofluvial deposits
RC 5
Clay covered areas

CONFIRMATION OR REJECTION / REVISION: L2
HRC 2
Glacial till

CONFIRMATION OR REJECTION / REVISION: L4
HRC 4
Wave washed deposits

THANK YOU FOR LISTENING !
QUESTIONS ?.....
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1. WATER OPERATIONS IN URBAN / RURAL AREAS: PERMITS, INVESTIGATIONS, TECHNICAL MEASURES AND MONITORING Pramod Surendran Supervisor: Åsa Fransson, Co-Supervisor: Mark Johnson, Examiner: Roland Barthel

2. CONTENTS • Introduction • Case study area • Methods and materials – Assumptions of Hydrogeological Reference Conditions, HRCs based on geological history and cartographic studies – Confirmation or rejection based on borehole data • Conclusions

3. HYDROGEOLOGICAL REFERENCE CONDITIONS, HRCs Reference Condition (HRC) 1 Crystalline bedrock HRC 2 Glacial till HRC 4 Wave washed deposits HRC 3 Glaciofluvial deposits HRC 5 Clay covered areas

4. WHAT IS A WATER OPERATION? • Groundwater discharge Extraction of groundwater from subsurface to the surface (pumping). • Groundwater recharge Introduce infiltration process. • Permit from Environmental court

5. WHAT DO WE NEED TO PROTECT ? • Energy wells • Natural environment • Cultural environment • Buildings and infrastructure facilities • Water supplies

6. ENVIRONMENTAL IMPACTS • Lowering of groundwater (GW) level • Settlements • Settlements and damage to buildings around/near construction area • Damage to Ecosystem • Technical, protective and monitoring measures needed to fullfill the permit from environmental court.

7. CASE STUDY AREA • 80 km south • Varberg to Hamra • Blue stretch • Yellow stretch

8. METHODS AND MATERIALS • Assumptions of HRCs based on geological history and cartographic studies • Confirmation or rejection based on borehole data

9. GEOLOGICAL HISTORY AND CARTOGRAPHIC STUDIES Topography map Quaternary deposits map Bedrock map

10. GEOLOGICAL HISTORY AND CARTOGRAPHIC STUDIES Shoreline map Depth to Bedrock map

11. EXAMPLES LOCATION 2 (L2) AND LOCATION 4 (L4) • L2 – HRC2 • L4 – HRC4 Quaternary deposits map

12. ASSUMED HRCs FOR LOCATION L2 AND L4 Reference Condition (RC) 1 Crystalline bedrock HRC 2 Glacial till HRC 4 Wave washed deposits HRC 3 Glaciofluvial deposits RC 5 Clay covered areas

13. BOREHOLE DATAS Quaternary deposits map

14. CONFIRMATION OR REJECTION / REVISION: L2 HRC 2 Glacial till

15. CONFIRMATION OR REJECTION / REVISION: L4 HRC 4 Wave washed deposits

16. CONCLUSIONS • Method based on HRCs, geological history, cartographic studies and borehole data • Assumed HRCs for the two locations confirmed • Promising, since: – Flexibility (early stages, changes in line and profile) – Depth ( from early to late stages ) – Integration (basis for interdisciplinary discussions on technical and protective measures, e.g. grouting and infiltration)

17. THANK YOU FOR LISTENING ! QUESTIONS ?..... 2019-10-23

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