FM/FISH 328 Forestry-Fisheries Interactions

Assignment 2

Soil - Water

Problem 1 15/15 pts

Find the Mashel river stream gauge record and

a) provide data on the information provided (e.g. gage identifier, records kept)

b) The gage is located in the vicinity of a particular highway, which one is it?

c) Within which larger drainage area or watershed is it located

d) Establish what the record maximum flowrate was and when it occurred.

Useful link: How to find water data

Problem 2 20/20pts

Calculate the 100-year event or flowrate that passes the Mashel gage station, using the “USGC method (outlined in DNR’s Watershed Manual, Hydrology Module).

The original articlae about flow event calculations

Compare the calculated Qmax for the 100 year event with the maximum flow rates on record, any comments?

Problem 3 20/20pts

Write a basic water balance equation for the Mashel drainage, using the average mean annual stream flow for Run-off. Clearly state any assumptions. Use units of inches

Problem 4 5/5pts

For erosion to occur what conditions have to be present

Problem 5 20/20pts

Find a description of a

Everett soil

Indianola soil

Classify the Everett soil in the USCS system, likewise for the Indianola soil

Problem 6 20/20pts

In a discussion about erosion and sediment deliveries to streams from roads a statement is made that if a road is more than 200 ft away from a stream zero sediment delivery is assumed.

Is that correct? What is the argument for such a statement?

Provide a specific link to whatever source, citation, to substantiate your answer

( yo might want to check the DNR Watershed Analysis Manual and/or Washington road Surface erosion Model (WARSEM)