DRAINAGE & SETTLEMENT

PATTERNSLESSON 7

Drainage Patterns5 types of drainage patterns can be identified on a

top-sheet

1.TRELLIS PATTERN / RECTANGULAR PATTERN

2. DENTRITIC PATTERN 3. PARALLEL PATTERN

4. RADIAL PATTERN & 5. DISAPPEARING PATTERN

TRELLIS PATTERN

TRIBUTARIES ARE SEEN MEETING THE MAIN STREAM AT A RIGHT ANGLE.

THE DRAINAGE SYSTEM THAT THUS DEVELOPS LOOKS SOMEWHAT RECTANGULAR.

DENDRITIC PATTERN

THE MOST COMMON DRAINAGE PATTERN.

TRIBUTARIES COME FROM ALL DIRECTIONS TO MEET THE MAIN RIVER. LOOKS SOMEWHAT

LIKE TREE BRANCHES.

PARALLEL PATTERN

MANY RIVERS RUN PARALLEL TO EACH OTHER.

RADIAL PATTERNSTREAMS DIVERGE FROM A CENTRAL HIGHER POINT IN ALL DIRECTIONS.

ALSO CALLED AS CENTRIFUGAL PATTERN

DISAPPEARING PATTERN

TRIBUTARIES DISAPPEAR INTO THE SOIL BEFORE REACHING THE MAIN RIVER.

MOSTLY FOUND IN REGIONS OF LIMESTONE ROCKS.

SETLLEMENT PATTERNS

4 MAIN TYPES OF SETTLEMENT PATTERNS FOUND ON TOPO-SHEETS :

NUCLEATED, DISPERSED, LINEAR & RADIAL

NUCLEATED OR COMPACT PATTERN

NUMBER OF HOUSES BUILT CLOSE TO ONE ANOTHER

DISPERSED PATTERN

ISOLATED SETTLEMENTS SCATTERED IN AN AREA.

ALSO CALLED AS SCATTERED SETTLEMENT.

LINEAR PATTERNDEVELOP ALONG ROADSIDES, RIVERS, CANALS OR A RAILWAY LINE SO THAT

EVERYONE CAN TAKE ADVANTAGE.

FORM A RIBBON LIKE PATTERN.

RADIAL PATTERNLANES OF HOUSES DIVERGE IN VARIOUS DIRECTIONS FROM A COMMON POINT.