Islands Trust Area Groundwater Recharge Potential Mapping Report, 2021
· Islands Trust Area · Reports & Publications · 2021
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Topics: Fresh water & aquifers · Governance & budget · Climate & environment — our classification, not the Trust's.
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October 18, 2021 Project No. 20-18 __________________________________________________________________________________________________________________________________________________________________________________________________________ GW Solutions Inc. Unit 24 – 4800 Island Hwy, Nanaimo, BC, V9T 1W6 Tel. (250) 756-4538 * abarroso@gwsolutions.ca Islands Trust Area Groundwater Recharge Potential Mapping Prepared for: Islands Trust Prepared by GW Solutions Inc. October 2021 Groundwater Recharge Potential October 18, 2021 ___________________________________________________________________________________________________________________________________________________________________________________________________ _______________________________________________________________________________________________________________________________________________________________________________________________________ Page ii Project No.20-18 Table of Contents 1 BACKGROUND AND OBJECTIVES ................................................................................................................................... 1 1.1 BACKGROUND ................................................................................................................................................................ 1 1.2 OBJECTIVES AND SCOPE ................................................................................................................................................. 1 2 DATA COMPILATION ......................................................................................................................................................... 4 3 DELINEATION OF GROUNDWATER MANAGEMENT REGIONS ..................................................................................... 5 4 DEFINITION OF BEDROCK LINEAMENTS ....................................................................................................................... 7 5 TOPOGRAPHIC WETNESS INDEX ................................................................................................................................... 9 6 DELINEATION OF GROUNDWATER RECHARGE AND DISCHARGE AREAS................................................................ 9 6.1 DEPTH TO WATER METHODOLOGY ................................................................................................................................. 10 6.2 REMOTE SENSING/ SATELLITE MULTISPECTRAL IMAGE ANALYSIS METHODOLOGY ............................................................. 11 6.2.1 Normalized Difference Vegetation Index (NDVI) and Normalized Difference Moisture Index (NDMI) method .... 11 6.2.2 Thermal data method .......................................................................................................................................... 12 7 GROUNDWATER RECHARGE POTENTIAL .................................................................................
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