9.4. A small farm reservoir behaves as two identical CFSTRs in series. Flow into the reservoir consists of runoff from pasture land having an average BOD, of 50 g/m³ and an average flow rate of 0.5 m³/s. Volume of the reservoir is 2.16 x 106 m³. If k = 0.2 d-¹ and k, = 0.35 d-¹ at 20°C, determine the dissolved-oxygen concentration if the water temperature is 20°C, the inflow is anaerobic, and steady-state conditions exist.

Q: Problem (1) Find the quantity of discharge q in meter cube per second per meter width for the…

A: To Determine Quantity of discharge, q in m³/s/m

Q: A small lake with volume 20.0*10^3 m^3 has no natural pollutant sources. However, a sewage pipe…

A: Given data: C1 (concentration of pollutants in sewage pipe)=100 mg/lVolume of the lake (V) =20,000…

Q: Problem 2. The evaporation losses from a reservoir of constant surface area of 500 hectares are 250…

A: Given data: Surface Area of reservoir = 500 hectares. Evaporation loss = 250 acre-ft per day. Out…

Q: The long-term average annual precipitation (P) over a reservoir (surface area = 186 mi²) is 40…

A: (1) The long term average annual precipitation( P) over a reservoir is(2) Surface area…

Q: drainage basin has an area of 9350 km2. The average annual precipitation for this area is 827 mm.…

A:

Q: CHANGE OF STORAGE VOLUME PART A At a particular time, the storage in a river reach is 84000 m. At…

A: Initial storage in river =84000m3Initial inflow, I1=3.1m3sInitial outflow, O1=3.7m3sFinal inflow,…

Q: What is the critical depth in a rectangular channel with 2.3 m width and 0.91 m2/s discharge per…

A: What is the critical depth in a rectangular channel and calculate minimum specific energy?

Q: In a stream the base flow is observed to be 30 cumec on July 14, and 23 cumec on July 23. Estimate…

A:

Q: A reservoir has average surface area of 20km². Mean rate of inflow is 10 m²/S mean outflow is 15…

A:

Q: BOD 6A waste water stream (flow = 2 m³/s,ultimate = 90 mg/l) is joining a small river (flow = 12…

A:

Q: DAM 30 FT FLOW T = 20 FT SAND IMPERVIOUS ROCK B = 240 FT The total length of the dam shown is 800…

A:

Q: A lake with no outlet has a steady state volume of 5 x 1011 m3, the salt concentration in the lake…

A: Given, V = 5 x 1011 m3  C = 100 gm/L  Qin = 3 x 109 m3/year Cin = 0.2 gm/L

Q: Long Pond has a surface area of 3.5 km2, and for a given month the pond has an average inflow of 3.4…

A: Given data the surface area of 3.5 km2=3.5x106 m2 inflow= 3.4 m3/s outflow = 2.75 m3/s storage…

Q: An equation for the hydraulic head in the unconfined aquifer between the two canals. An estimate of…

A: To find flow rate and equation of hydraulic head

Q: Salt lake has no outlet i.e., the inlet flow is completely balanced by evaporation. Lake has a…

A: Lake has a volume of 2.5 x 1011 m3 and the concentration of salt in the lake is 52 g/L. The inlet…

Q: A completely mixed pond of volume, V, has an influent steady-state flow, Q, entering with a BOD,…

A:

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.