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ARS Home » Southeast Area » Oxford, Mississippi » National Sedimentation Laboratory » Watershed Physical Processes Research » Research » Research Project #434407

Research Project: Managing Water and Sediment Movement in Agricultural Watersheds

Location: Watershed Physical Processes Research

Project Number: 6060-13000-026-34-N
Project Type: Non-Funded Cooperative Agreement

Start Date: Mar 1, 2018
End Date: Sep 30, 2020

Objective:
The objective of this project is to obtain mechanical soil properties of earthen dams in Mississippi. The data will be used to improve the ability of computer models to predict the erosion and failure of earthen dams.

Approach:
A senior Civil Engineering student, will collect soil samples and perform the analyses listed below: 1) Field data collection and tests a) In-situ soil tests i) Jet erosion test ii) Vane shear test for the strength of soft clays b) Sample collection i) Core samples for laboratory jet test (intact cylindrical samples having a diameter and height of 6 inches) ii) 2-inch samples for laboratory shear-box tests iii) Soil samples for laboratory tests of soil texture 2) Laboratory tests of collected soil samples a) Soil texture classification b) Grain size distribution analysis i) Sieve analysis for materials with grain size larger than 2 mm ii) Pipette method for grain sizes smaller than 2 mm iii) Bulk density (intact samples using a ring of known volume collected in the field iv) Dry density v) Atterberg limits (plastic limit and plasticity index, and liquid limit) vi) Shear-box test c) Jet erosion test