Transcript
SESSION 3
PLANNING
A. BASIC INFORMATION
A1. WEATHER
A2. TYPE OF PEATLANDS
Peat
A2a. RIVER BASIN PEATLAND
Mineral soil
river
River basin peatland
A2a. River basin peatland
A2a. River basin peatland
A2b. Coastal peatland
river
sea peat
Mineral soil
A2b. Coastal peatland
Disadvantages
1. Accessibility is not easy either by sea or river
2. Saline water intrusion during highest tide
A2b. COASTAL PEATLAND
A3. PEAT TYPES
Mature peat
Semi-mature peat
Semi-raw peat
A3a. MATURITY OF PEAT
Peat under soil water table
Mineral soil
50 cm
50 cm
50cm
50 cm
A3b. Peat depth less than 2 m
Subsidence Level
Compaction level
subsidence Soil water table
compaction
A4. Soil type below peat layer
A4a. Potential Acid Sulphate soil
pyrite
A4b. Riverine alluvial
A4c. Marine clay
A4d. Beach sand
A5. DEPTH OF SOIL WATER TABLE
• Drainable and undrainable
B. Advance Information
e
River or sea
Low lying area
River bank or Sea coast Peat dome moderate elevation
Cross section of peatland location
PEAT
MINERAL SOIL
PEAT
B1. Peat dome
peat
Mineral soil
Peat dome
Mineral soil
sea
river
Water catchment area
B1. Peat dome
B1. Deep soil water table at peat dome
B2. Low lying area
river bank or sea coast
Low lying area River or sea
peat
Mineral soil
Higher elevation
B2. Low lying area
B2. Low lying area
• Difficult to drain
• Water logged during wet season
B3. Area subjected to river flood
Highest Flood level Area subjected to flood
during wet season
peat
Area free of flood
Low lying area
River basin peatland
Mineral soil
river Water level during dry season
B3. Area subjected to flood
Flood during wet season
B4. Area subjected to flood
B4. Area subjected to tidal influence
Area subjected to tidal influence
sea
sea coast
Coastal peatland
Water level of land
B4. Area subjected to tidal influence
Problem
Solution
B4. Area subjected to tidal influence
Purpose 1. To prevent undrainable area
2. To prevent saline water intrusion
REST
TO BE CONTINUED
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