Environmental Engineering Reference
In-Depth Information
TABLE 6.2
Geologic Conditions and Typical Drainage Patterns
a
Geologic Condition Predominant Geologic Condition Predominant
Drainage Pattern Drainage Pattern
I. Uniform Rock Composition with Residual Soil but Weak or no Rock Structure Control
Sandstone (coarse texture
b
)
Interbedded thick beds of
sandstones and shales
Coarse dendritic
Coarse to medium
dendritic
Interbedded thin beds of
Shale
sandstone and shale (medium
texture
c
)
Medium dendritic
Medium to fine
dendritic
Clay shale, chalk, volcanic tuff
Intrusive igneous (granite)
(fine texture
d
)
Domes
Fine dendritic
Medium to fine
dendritic with
curvilinear
alignments
II. Controlled by Rock Structure
Joint and foliation systems in
Joint and fault systems in
regular pattern
irregular pattern
Rectangular
Angulate
Gneiss
Slate
Fine to medium
Fine rectangular
angular dendritic
dendritic
(
Continued
)
