1. Remediation
· Efforts to reduce fecal coliforms, non-filterable residue, turbidity, and periphyton chlorophyll-a levels in this river should continue as outlined in the B.C. Water Quality Status report, including rehabilitating streamside vegetation, and preventing direct access to the water by cattle (Ministry of Environment, Lands and Parks, 1996).
2. Monitoring
· Monitoring
should continue for the following variables related to agriculture,
forestry and urbanisation: flow, hardness, periphyton
chlorophyll-a, fecal coliforms, true colour, E. coli,
ammonia, total dissolved nitrogen, pH, total dissolved phosphorus,
non-filterable residue, sulphate, turbidity and specific
conductivity.
· The following
metals have had levels exceeding criteria within the past two years
(i.e., 1994-95), and thus should be monitored (total and
dissolved): aluminium, chromium, copper, iron, manganese, and
titanium.
· Minimum detectable
limits (MDLs) should be lowered for antimony, arsenic, cadmium,
chromium, copper, lead, selenium, silver, thallium and zinc. MDLs
should be at least 10 times below the water quality criteria for
all variables.
· Increased sampling
of 5 samples in 30 days should be employed for copper, E.
coli and fecal coliforms to compare to criteria and objectives
more precisely.
Figure 1 Map of the Bonaparte River Basin
AUTHORS
Brewer, L. Co-op Student, Water Quality Section, Water Management Branch, Ministry of Environment, Lands and Parks, Victoria, B.C.
Webber, T. Water Quality Section, Water Management Branch, Ministry of Environment, Lands and Parks, Victoria, B.C.
CONTRIBUTORS
Boettger, Barry. Public Health Protection, Ministry of Health, Victoria, B.C.
Grace, Robert. Environmental Protection, Southern Interior Region, Ministry of Environment, Lands and Parks, Kamloops, B.C.
Jang, Leon. Co-op Student, Water Quality Section, Water Management Branch, Ministry of Environment, Lands and Parks, Victoria, B.C.
Pommen, Larry. Water Quality Section, Water Management Branch, Ministry of Environment, Lands and Parks, Victoria, B.C.
Rocchini, Roland. Water Quality Section, Water Management Branch, Ministry of Environment, Lands and Parks, Victoria, B.C.
Ryan, Andrea. Environment Canada, Vancouver, B.C.
Swain, Les. Water Quality Section, Water Management Branch, Ministry of Environment, Lands and Parks, Victoria, B.C.