Topography
Khlong Kui watershed includes high mountain range
(max. 958 m) on the West, hilly and rolling land, plain, and
floodplain to the cost on the East as presented in Figure 1.
High mountain ranges, the major landscape of the Khlong
Kui watershed, are mostly in the upper watershed and are
mostly covered by forest. Forests in these areas are strictly
conserved as water sources. Plains, which cover a small part
of the watershed, are used for crop, orchard, and vegetable
cultivations. Floodplains, the second large landscape,
surround the main rivers and are mostly located in the lower
watershed. These areas are generally used for rice cultivations.
Deforestation and soil erosion are the major environmental
problems in the watershed. These problems are more
prominent in the mountain ranges and hilly and rolling lands.