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.