18-Geom-B6 Land Use Planning and Environmental Management · May 2015
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams, May 2015 — 04-Geom-B6, Land Use, Planning & Environmental Management. Three hours; closed book (any non-communicating calculator permitted). Format: seven questions of equal value (20 marks each); the paper directs that answering any five (5) of the seven constitutes a complete exam (100%), and the first five as they appear in the answer book are marked. All seven questions are solved in full below so the set serves as a complete study resource. Answers are framed in the Canadian planning context (Statistics Canada’s census-geography definitions; the Canadian Institute of Planners; provincial planning legislation, official community plans and regional growth strategies), consistent with the Engineers Canada / EGBC syllabus for this exam.
Reference texts: G. Hodge & D. Gordon, Planning Canadian Communities: An Introduction to the Principles, Practice and Participants (Nelson, current ed.) — the standard Canadian reference for this exam code; I. McHarg, Design with Nature (1969) — the sieve/overlay method underlying GIS site analysis; J. Garreau, Edge City: Life on the New Frontier (1991); Statistics Canada, Census Dictionary (population centre, census metropolitan area and census agglomeration definitions); Canadian Institute of Planners (CIP) materials; World Commission on Environment and Development, Our Common Future (Brundtland Report, 1987); provincial planning statutes (e.g., Ontario Planning Act, R.S.O. 1990, c. P.13; British Columbia Local Government Act) and representative official community plans / regional growth strategies (Metro Vancouver, the Greater Golden Horseshoe Growth Plan).
Question 4 uses the exam’s terms “urbanized area” and “metropolitan area.” In current Statistics Canada usage the closest official equivalents are the population centre (which replaced the older term “urban area” in 2011) and the census metropolitan area (CMA). The answer uses the official Canadian terms and notes the correspondence, rather than importing the U.S. Census “urbanized area” definition.
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
Planning to secure a community’s future water supply is an exercise in balancing future demand against a finite, quality-sensitive and legally shared resource, over a long horizon and under uncertainty (including climate change). Four key factors must be addressed together.
1. Future demand — population growth and consumption. The first factor is how much water will be needed. This means forecasting population and economic growth, and the per-capita and sectoral (residential, commercial, industrial, agricultural) demand, over the planning horizon. Crucially it includes demand management — conservation, metering, efficient fixtures, leak reduction and pricing — because reducing demand is often cheaper and more sustainable than developing new supply. Land-use planning shapes demand directly: compact, efficient development uses less water per capita than sprawl.
2. Adequacy and reliability of the supply source (quantity and sustainable yield). The second factor is the resource itself — the surface-water and groundwater sources, their safe/sustainable yield, storage (reservoirs, aquifers) and the reliability of that yield under drought and seasonal variation. Planning must not commit demand beyond the sustainable yield of the source and must build in reserve and diversity of sources against dry years and, increasingly, against a changing climate.
3. Protection of water quality and the source watershed. Quantity is useless without quality, so a key factor is protecting the source from contamination — watershed and wellhead protection, control of land uses and effluents in the catchment, buffers along watercourses, and safeguarding recharge areas. This is fundamentally a land-use-planning task: the quality of the future supply depends on how the land in the watershed is used and regulated today (a lesson Canada absorbed after the Walkerton tragedy).
4. Environmental (ecological) impacts and the legal/institutional framework. Withdrawing and storing water has ecological consequences — instream flow needs for fish and aquatic habitat, wetland and downstream effects — that must be assessed (environmental assessment) and respected, leaving enough water in the system for the environment itself. This factor also encompasses the institutional and legal framework: water is often a shared, trans-boundary resource governed by provincial licensing, inter-jurisdictional agreements and integrated watershed management, so future supply must be planned cooperatively within that framework.
These four factors — demand, sustainable supply, source-water quality protection, and environmental/legal constraints — are interdependent: sound water-supply planning matches manageable demand to a protected, sustainably yielded source while leaving enough water, of adequate quality, for ecosystems and other users, all within the governing legal regime.
