Runoff and Erosion - Data Entry Template-1

xlsx

School

North Carolina State University *

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Course

001

Subject

Geography

Date

Oct 30, 2023

Type

xlsx

Pages

4

Uploaded by DukeScience99627

Report
Procedure a. Calculate the area of each type of land cover. Land Cover Identifier Curve Number % total area Sums b. Calculate the storage, S, and the initial abstraction, Ia S Ia c. Calculate the runoff, Q (in inches) for each month in inches, cubic feet, and d. Calculate the Nitrogen and Phosphorus in the runoff each month. Remembe Month Inches of Rain Runoff (inches) Jan 4.64 Feb 3.82 March 4.35 April 3.25 May 4.16 June 3.86 July 4.39 Aug 4.46 Sep 4.86 Oct 3.3 Nov 3.46 Dec 3.43 TOTAL Soil Loss Calculation a. Find the rainfall energy factor R= b. Record the Erodability factor (K) from the figure. K= c. Calculate the slope-length factor length= slope= LS= d. Pick a suitable cropping factor and protection facto C= e. Calculate the soil loss in tons/ha using the universal soil loss equation. f. Calculate the expected mass of soil loss in kg using the table below.
Q1: Q2: Q3: Reduce Runoff Reduce Sediment Transfer Reduce Nutrients in the Runoff
Area (sq ft) % * Curve Number Curve Number liters and put it in the table. There are 28.32 liters per cubic foot. Dissolved N (mg/l) Dissolved P (mg/l) er to convert mg to kg. Record your table factors to the right --> Runoff (liters) Nitrogen (kg) Phosphorus (kg) change in elevation= <-use same units! slope% P= Item Value Unit A - Annual soil loss tons/ha ha per square meters 0.0001 ha/m2 tons per m2 tons / m2 Square feet of land open to erosion ft2 square meters per square foot 0.0929 m2/ft2 Square meters of land open to erosion m2 tons of soil loss tons kg per ton 907.2 kg/ton Runoff (cubic feet)
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kg of soil loss kg Nitrogen load mg/kg Annual nitrogen from sediment kg Phosphorus load mg/kg Annual phosphorus from sediment kg

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