# Project #55526 - Science and Technology

Instructions:

Lab 3 - Soil Infiltration and Runoff

You will be conducting field research on vegetation-covered, smooth-rock covered, paved, and bare soil surfaces after rainfall to determine infiltration and runoff results.

Enter the Lab through the third item and proceed to Phase 3. Use all available resources, as well as the provided course materials and web resources to complete your lab report.  Use Lab Report Below.

===========================================

Name:

Date:

Instructor’s Name:

Assignment: Lab Report

Title: Soil Infiltration and Runoff

Instructions: Enter the Virtual Lab and gather the information needed to complete the report from the field. Please type your answers on this form. When your lab report is complete, submit it to the Submitted Assignments area of the Virtual Classroom.

Part I: Field Research

Section 1: Gather the following information from field research while in the Phase 3 lab environment. Notice that each site you visit has a distinctly different surface, which could affect runoff.

 One Inch of Rainfall Shallow water infiltration Deep water infiltration Runoff water Evaporation water Vegetation Mountain Bare soil

Section 2: Now you will look at how many gallons of water end up as infiltration, runoff or evaporation after one inch of rainfall.  One inch of rainfall deposits 144 cubic inches or 0.623 gallons of water per square foot of surface area. Use the following formula to calculate the amount of water after one inch of rainfall (in gallons) for each section:

0.623 gal/ square foot x (square feet of surface area) x (% from table 1*) = gallons rain water

*Remember to convert percentages to decimals prior to doing the above calculation.  For example: 40% is written as 0.40 in this equation.

 One Inch of Rainfall Shallow water infiltration Deep water infiltration Runoff water Evaporation water Vegetation Mountain Bare soil

Part II: For the following questions, provide your response in short-answer format (2–3 sentences each). Use this Phase’s activities and resources to assist you in answering.

1.             How does the vegetation surface type affect the amount of runoff? Speculate why this happens.

2.             How does the smooth mountain rock surface type affect the amount of runoff? Speculate why this happens.

3.             How does the bare soil surface type affect the amount of runoff? Speculate why this happens.

4.             How does vegetation slow and prevent sediment loss?

5.             How does vegetation allow greater infiltration?

6.             How does pavement or smooth rock runoff affect waterways?

7.             How do heavy sediment deposits affect waterways?

8.             How does sediment loss affect land and soil quality?

 Subject Science Due By (Pacific Time) 01/31/2015 12:00 am
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