1 / 96

Truths and Misconceptions about Pender Islands Groundwater: Planning for the Future

This article explores the truths and misconceptions related to groundwater on the Pender Islands. It discusses various groundwater issues, the conceptual model for groundwater management, the relationship between climate and water resource management, factors influencing groundwater recharge and availability, geophysical measurements, and population growth. The article aims to provide valuable insights for planning future groundwater management on the Pender Islands.

pwatanabe
Download Presentation

Truths and Misconceptions about Pender Islands Groundwater: Planning for the Future

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. Truths and Misconceptions about Pender Islands Groundwater: Planning for the Future Dr. James D. Henderson October 10, 2015

  2. Why Small Islands ?

  3. Why the Penders?

  4. TRUTHS • Water runs downhill • Freshwater floats on saltwater • Province of B.C. owns all groundwater • Only fresh water source is rainfall

  5. GROUNDWATER ISSUES Drought Saline intrusion/Other contamination Water well interference Seismicity Lack of alternative natural water sources Time frame Changing legislation

  6. Conceptual Model for Groundwater Management

  7. Prescriptive Approach to Physical Setting Investigations

  8. Interaction of Natural Processes

  9. CLIMATE

  10. Water Balance Equation Inputs = Outputs + Changes in Storage

  11. Revised Water Balance Equation P = R +/- O +/- G +/- S +/- I +/- C +/- M + E

  12. Relationship between climate and water resource management

  13. Annual precipitation, 1925 – 2002

  14. Average monthly precipitation

  15. AVERAGE ANNUAL TEMPERATURE

  16. AVERAGE MONTHLY TEMPERATURE

  17. EVAPOTRANSPIRATION

  18. DRYING INDEX

  19. GEOLOGY

  20. FACTORS INFLUENCING GROUNDWATER RECHARGE • texture and gradation of surface and near surface deposits and their vertical permeability • nature and consumptive use of the vegetative cover • frequency, intensity and volume of rainfall • soil moisture content • topography • temperature.

  21. from: Islands Trust Groundwater Toolkit, 2014

  22. WATER AVAILABILITY, REQUIREMENT AND USE • Protection of aquatic and wetland habitat • High well development • Management of extreme events (drought, flood, etc.) • Excessive extraction from surface and ground waters • Climate change • Safe drinking water supply • Land use

  23. Geophysical Measurements

  24. Objectives of Geophysics • Freshwater/saltwater contact • Bedrock depth and degree of fracturing • Fault Location • Variability of soil type and thickness

  25. Southlands Drive Geophysical Section

  26. Ghyben-Hertzberg Equation hs = (Pf / (Ps-Pf))(hf)

  27. Conceptual Groundwater Flow Model Medicine Beach

  28. POPULATION GROWTH Pender Census 2001 1,776 Pender Census 2006 2,181 Pender Census 2013 2,236 VIHA Projection 2033 2,840

  29. Water Well Statistics – North Pender

  30. Groundwater Basins – North Pender

  31. Water Supply Systems, North Pender

  32. OW283

More Related