5. (Phosphorus cycle,.Julana Lake has a surface area of 4.1 x 106 m². The2.02 m³ s¹ and a phosphorus concentration of 0.023 mg L. A wastewateraverage depth of the lake is 15 m. The lake is fed by a stream having a flow rate oftreatment plant discharge into the lake at a rate of 0.2 m³ s¹ and a phosphorusconcentration of 1.1 mg L-1. Runoff from the homes along the bank of the lakeadds phosphorus at an average rate of 1.35 g s¹. The settling rate of phosphorusfrom the lake averages 0.94 year¹. The river flows from the lake at a flow rate of2.42 m³ s¹. Assume evaporation and precipitation to negate each other.5.1.What is the concentration of phosphorus in the river flowing from the lake?From the Table below, determine the trophic category of the lake.5.2.Table 1. Total phosphorus, chlorophyll a and Secchi Disk depth boundary values fordetermining a lake's trophic state (Vollenweider and Kerekes 1982).Trophic CategoryUltra-oligotrophicOligotrophicMesotrophicEutrophicHyper-eutrophicTP(ug L-¹)<4<1010-3535-100>100MeanChlorophyll(mg m<1<2.52.5-88-25>25MaxChlorophyll(mg m)<2.5<88-2525-75>75Mean Secchi Min SecchiDepthDepth(m)(m)>12>6>6>33-1.51.5-0.7<0.76-33-1.5<1.5Explanation of terms:TP- mean annual in lake total phosphorus concentration;Mean Chlorophyll - mean annual chlorophyll a concentration in surface waters;Max Chlorophyll - peak annual chlorophyll a concentration in surface waters;Mean Secchi Depth-mean annual Secchi Disk depth:Min Secchi Depth-minimum annual Secchi Disk depth.

Surface area of the lake = 4.1×106 m2 Lake depth= 15 m Input flow in stream (Qin)=2.02 m3/sec…

5. (Phosphorus cycle, Julana Lake has a surface area of 4.1 x 106 m². The 2.02 m³ s¹ and a phosphorus concentration of 0.023 mg L-¹. A wastewater average depth of the lake is 15 m. The lake is fed by a stream having a flow rate of treatment plant discharge into the lake at a rate of 0.2 m³ s¹ and a phosphorus concentration of 1.1 mg L. Runoff from the homes along the bank of the lake adds phosphorus at an average rate of 1.35 g s¹. The settling rate of phosphorus from the lake averages 0.94 year¹. The river flows from the lake at a flow rate of 2.42 m³ s¹. Assume evaporation and precipitation to negate each other. 5.1. What is the concentration of phosphorus in the river flowing from the lake? fabo lake.

5. (Phosphorus cycle, Julana Lake has a surface area of 4.1 x 106 m². The 2.02 m³ s¹ and a phosphorus concentration of 0.023 mg L-¹. A wastewater average depth of the lake is 15 m. The lake is fed by a stream having a flow rate of treatment plant discharge into the lake at a rate of 0.2 m³ s¹ and a phosphorus concentration of 1.1 mg L. Runoff from the homes along the bank of the lake adds phosphorus at an average rate of 1.35 g s¹. The settling rate of phosphorus from the lake averages 0.94 year¹. The river flows from the lake at a flow rate of 2.42 m³ s¹. Assume evaporation and precipitation to negate each other. 5.1. What is the concentration of phosphorus in the river flowing from the lake? fabo lake.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Please help.
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16
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