booklet aceh barat.pdf - Balai Penelitian Tanah

Table 1. Amount of rainfall and number of rain days in Aceh Barat District, 2005 -
2006
M o n t h
Rainfall (mm)
2005 2006
Rain Days
2005 2006
January - 295 - 14
February - 135 - 17
March - 351 - 13
April 358 401 20 17
May 240 171 15 14
June 297 181 16 13
July 290 94 14 12
August 246 179 17 11
September 265 464 12 19
October 398 473 23 20
November 486 405 24 24
December 283 548 31 21
Total 2,866 3,702 172 195
Mean 318 308 19 16
Source: Statistics Office of Aceh Barat District, 2006, based on observation at Meteorology
and Geophyisical Station of Cut Nyak Dhien Airport.
- = No data.
2.2. Physiography and Landform
Aceh Barat District is divided into 6 physiographic groups, namely: Marine
(M), Alluvial (A), Peat Domes (D) Tectonic (T), Karstic (K) and Volcanic/Intrusive (V)
as presented in Table 3.
2.2.1. Alluvial Group
Alluvial physiographic group consists of land/terrain formed by fine to
coarse deposition of river flow processes. In the river terraces and flood plain, the
materials tend to be coarse sandy deposits, while in alluvial plain and back swamp
are finer materials. This physiographic group is often flooded, except in river terraces
where the drainage is somewhat better. Soils in the alluvial and alluvial flood plain
are dominated by Hydraquents, Endoaquents and Fluventic Eutrudepts. In the
frequently flooded back swamp, the soils are Endoaquents while in the river terraces
Dystrudepts and Fluventic Eutrudepts are dominant.
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