Base de données de recherche des TNO

étiquettes: physical sciences, bathymetry, water quantity, aerial survey

Objectif(s): To gather lake bathymetry data in support of estimating water volumes required for regulatory approval for winter water extraction.

Description du projet: A Lake Bathymetry Survey is required for lakes along the proposed Highway between km 105 and km 120. The objective of the survey is to gather lake bathymetry data in support of estimating water volumes required for regulatory approval for winter water extraction. This work will be completed further to responsible environmental and engineering practices as outlined in Environmental Impact Statement for Construction of the Inuvik to Tuktoyaktuk Highway, NWT, which was submitted to the Environmental Impact Review Board (EIRB) in 2011. IMG-Golder Corp. is proposing to carry out a Lake Bathymetry Survey along the Highway between km 105 and km 120. A field crew of two plus one Wildlife Monitor will collect bathymetry data from approximately five to ten lakes in proximity to the proposed Highway. Those lakes will then serve as water sources for the construction of the winter access. The crew will perform an aerial survey of each lake and collect aerial photographs from the helicopter before landing. Observations such as inflow or outflow streams, islands, etc. will be recorded on a map of each lake. The bathymetry data will be collected from a boat with continuous depth recordings (i.e., at one or two second intervals). The depth recordings will be geo-referenced with a GPS inside the bathymetry recorder. The spacing of the bathymetric transects will be dependent on the size of each lake and the irregularity of the lake bottom. In general, one longitudinal transect connecting the two farthest shorelines will be surveyed. Subsequent cross transects (i.e., perpendicular to the longitudinal transect) will then be evenly spaced along the longitudinal transect. The wildlife monitor will have opportunity (if interested) to learn about standard techniques for and participate in Lake Bathymetry Survey A one page summary of all project activities will be submitted to the Inuvik Hunters’ and Trappers’ Committees and the Tuktoyaktuk Hunters’ and Trappers’ Committee. The fieldwork for this study will be conducted from August 7, 2012 to August 11, 2012.