Proceedings - Teaching and Learning Centre - Simon Fraser ...
Proceedings - Teaching and Learning Centre - Simon Fraser ...
Proceedings - Teaching and Learning Centre - Simon Fraser ...
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<strong>Fraser</strong> River Action Plan 3rd Research Workshop<br />
General Conclusions<br />
• Impact of agriculture on stream water quality:<br />
– excess of nutrients a major problem.<br />
Session 4:<br />
Agricultural Issues<br />
Chair: H. Schreier<br />
– stocking density far exceeds absorption capacity of the soils.<br />
– at certain times of the year, dissolved O2 depression problematic.<br />
– ammonia toxicity found in several agricultural streams.<br />
– Sumas R: impact of agriculture intensification on water quality is leading to extensive stream<br />
deterioration in the fall in areas where river is fed by rainwater inputs; in areas of river where<br />
groundwater inputs dominate, contamination is highest in August when groundwater inputs are<br />
greatest.<br />
– high nitrate values (above health st<strong>and</strong>ards) particularly for unconfined groundwater aquifers.<br />
– eutrophication: excess P is building up everywhere. When there are stormwater runoffs, sediments<br />
get into streams <strong>and</strong> this leads to eutrophication.<br />
– in terms of metals, agriculture contributes Zn, <strong>and</strong> some Cu — pig operations use these as dietary<br />
supplements, <strong>and</strong> as prophylactics.<br />
– pesticides do have effect on bird life — but limited studies have been done.<br />
• Implications <strong>and</strong> approaches useful to management:<br />
Discussion<br />
– pest management practices.<br />
– EPS - an index of manure management for farmers.<br />
– continued efforts to improve on farming practices, but no real solutions. Farmers are fixed in<br />
tradition <strong>and</strong> do not realize they have intensified their practices; need to convince farmers of the<br />
value of BMPs.<br />
– community involvement in setting objectives <strong>and</strong> monitoring efforts.<br />
– simulation modeling to forecast into the future.<br />
Vadas: The citizen monitoring programs need to be tested. Some of the organisms are too small.<br />
Schreier: The whole area of citizen participation is difficult.<br />
Johnstone: How can we start to feed the results to the community before all the papers are completed? How<br />
can we do this on an ongoing basis? Is this a reasonable expectation?<br />
Schreier: Initially, communities were not interested. But a constant feed of information to them helps. In<br />
Langley, they are now working with the community management. Langley is setting bylaws based on these<br />
studies.<br />
Hall: Cooperation with Burnaby is now building; both with stormwater management <strong>and</strong> flood control.<br />
Chambers: What are typical P, N application rates in the area?<br />
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