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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.34, no.4, 2001³â, pp.327-336
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( Influences of Seasonal Rainfall on Physical, Chemical and Biological Conditions Near the Intake Tower of Taechung Reservoir ) |
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| Physical, chemical, and biological parameters were measured during the period from July 1993 to August 1994 near the Munui intake tower of Taechung Reservoir to evaluate effects of nutrients and suspended solids on algal chlorophyll-a and water clarity. Large amounts of precipitation during summer 1993 produced minimum conductivity ($88;{mu}S/cm$), minimum TN : TP (<40), and maximum total phosphorus (TP;$59;{mu}g/L$) and resulted in a chlorophyll-a peak ($79;{mu}g/L$) and minimum transparency (<1.5 m) among the seasons. At the same time, ratios of volatile suspended solids (VSS): non-volatile suspended solids (NVSS) were maximum (13.0),indicating that the reduced transparency was mainly attributed to biogenic turbidity in relation to phytoplankton growth. In contrast, severe drought in summer 1994 resulted in greater conductivity (>$120;{mu}S/cm$), water clarity (%gt;2 m), and lower TP and chlorophyll- a (<$10;{mu}g/L$) relative to those of summer 1993. Total phosphorus ($R^2=0.46$, n=59) accounted more variations of chlorophyll- a compared to total nitrogen ($R^2=0,29$, n=59). The mass ratios of TN : TP ranged from 39 to 222 and were strongly correlated with TP (r = -0.80) but not with concentrations of TN (r = 0.05). Ambient nutrient concentrations and TN : TP mass ratios indicated that seasonality of chlorophyll- a was likely determined by concentrations of phosphorus reflected by the distribution of rainfall. It was concluded that reductions of phosphorus during heavy rainfall may provide better water quality for the drinking water in the intake tower. |
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| Ű¿öµå |
| Intake tower;Rainfall;Nutrients;Chlorophyll-a;Suspended solids; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.34, no.4, 2001³â, pp.327-336
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200118317178751)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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