FLOOD04263

• County: Statewide
• Basin: Statewide
• Title: Design of Open Channels
• Date: 10/1/1977
• Prepared By: USDA Soil Conservation Service
• Floodplain - Doc Type: Educational/Technical/Reference Information

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TABLE OF CONTENTS:

CHAPTER 3 - SITE INVESTIGATIONS

Introduction . . .

3-1

Investigation Requirements

.3-1

Geomorphology of Deposits.

3-2

Significance of the Stratigraphic Unit

3-2

Identification of Stratigraphic Units.

3-3

Geomorphic History as a Determinant of
Erosion Resistance . . . . . . . . . .

3-3

Discontinuities in Alluvial Stratigraphic Units. 3-5

Stratigraphic Units Without Internal Continuity. 3-6

Figure 3-1 -- Stratigraphic Units Related
to Channel Improvements Along a Stream and
Its Tributaries . . . . . . . . . . . . .. 3-7

Conducting the Site Investigation 3-6

Data Requirements and Observations Preliminary
to Site Investigations ..........

3-6

Reconnaissance of Site for Channel Improvements. 3-9

Determining the Intensity of Investigations. 3-11

Location of Sites for Sampling and Logging . 3-12

Determining the Sample Types to be Obtained. 3-13

Selection of Equipment for Logging and Sampling. 3-14

Figure 3-2 -- Undisturbed-Sample Cylinder
Press . . 3-15

Test Hole Logs 3-17

Figure 3-3 -- Work Sheet for Logging and
Sampling Data ............ 3-19

Determination of the Availability of Movable
Bed Material .. ............ 3-17