Circle The Drain Poem Analysis Video
Circle The Drain Poem Analysis
Sc, P. Suite16 Ave N. Line Creek Mine P. When blast rock is disposed of in a valley bottom through which a watercourse passes, the base of the dump is referred to as a "rock drain". The use of formal rock http://pinsoftek.com/wp-content/custom/summer-plan-essay/john-searle-the-chinese-room-argument.php to convey significant streamflows at mines in the mountainous regions of western Canada dates from Since then, rock drains have come into use at the majority of Rocky Mountain coal mines in Alberta and British Columbia.
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The Rock Drain Research Program was the first comprehensive study of the physical and flow-through characteristics of rock drains and their environmental effects. The program involved analysis and intensive field data collection over a four year period at Manalta Coal Limited's Line Creek Mine in south-eastern British Columbia.
The project comprised investigations into the physical, flow-through, and environmental characteristics of rock drains. Potential environmental issues included rock drain effects on suspended solids and bedload, water temperature, water chemistry, aquatic invertebrates, and fish.
This paper will present an overview of the "environmental effects" investigations of the program. These effects, though measurable in most cases, were found to be much less significant than initially Proceedings of the 22nd Annual British Columbia Mine Reclamation Symposium in Penticton, BC, The Technical and Research Committee on Reclamation anticipated. Apart from the physical reduction of aquatic habitat due to the presence of the drain, the impacts of the drains were found to be quite localized. The program was formally initiated in with final reporting in The Line Creek mine is located in a subalpine valley near the town of Sparwood, in south-eastern British Columbia, Canada. The drainage basin of Line Creek ranges from approximately to m, and lies just to the east of the continental divide. Average Circle The Drain Poem Analysis precipitation at the site was mmand mean monthly air temperatures Cicrle from a low of C in January to a high of The changing drain configurations presented significant problems for data analysis, but also the opportunity to examine the effects of drain length on a variety Circlf environmental variables.
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The Line Creek drainage is comprised of a number of tributary streams, the most significant of these being Line Creek and South Line Creek, which join downstream of the rock drain. Cold-blooded organisms such as aquatic invertebrates and fish are particularly sensitive to temperature change. Depending on the length and severity of the temperature change, an organism's metabolism, growth, reproduction, and distribution may be affected. Temperature changes upstream can alter the existing aquatic community downstream. If the resulting temperature changes are beyond the existing organisms' range of tolerance, their numbers will decrease and more tolerant organisms may colonise the area.
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It is reasonable to assume that temperatures within the rock drain are less variable than ambient temperatures. While the drain is highly porous to air, the huge mass of rock within the drain probably reacts Downstream of the MRD. A small portion of No Name Creek is covered by rock drains, while virtually the entire West Line Creek drainage is covered by a rock drain.
West Line Creek was of particular interest with respect to water quality concerns.
The stream bed is relatively coarse typically gravels and larger. The Technical and Research Committee on Reclamation slowly to changes in outside temperature. Consequently, one would expect a reduction in short-term variations in water flowing through the drain, but an increase in longer-term thermal effects.
Lastly, when water flows through the drain during the day it does not receive heat inputs from the sun, resulting in a relative reduction in downstream water temperatures. Ina monitoring station was added upstream of the RDE LC05thereby permitting an examination of temperature effects of both drains. Results Mean Daily Water Temperatures: The historical water temperature data indicate Circle The Drain Poem Analysis both mean daily water temperature and the magnitude of diurnal variations in water temperature have decreased at the downstream site since the construction of the MRD.]
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