Mostly is vast plain area. The area is connecting mountainous from the north adjoining the south and the summit of Khao Siphachan is in the West Side with 802 m high above msl, in the north is connecting Khao Ang Ruenai Wildlife Sanctuary , there were many of canals through this forest, Khlong Tanot is the main canal with its large and dept and amount of the stream. Moreover there is still Khlong Tanot canal in the north.
Climate
General condition is from the influent of northeast monsoon wind and southwest monsoon wind and there are 3 seasons obviously as cold season runs from the middle of October to February, which is the season of northwest monsoon wind with chilly temperature and barren. The coldest mount is January Summer runs from February to the middle of May and the hottest and stuffy month is April in circle year. Rain season runs from the middle of May to the middle of October that is the phase of southwest wind, with moist weather and rain along rainy season and there is the most of rain amount in October. Average temperature all year long is 28oC, dropping at 21oC.
Flora and Fauna
The condition of Khunsong National Reserved Forest used to work a concession of forest can classify into 3 types as Evergreen forest, which is the main economical and ecological forest, found in the low land of valley and foothills. Dry evergreen forest. The area is less than evergreen forest, found in the foothill area. The structure of plant community classified into 4 ranges as upper range, middle range, lower range and ground cover. Dry dipterocarp forest. The area is the least. Obvious species as Dipterocarpus intricatus, Careya sphaerica, Dillenia sp., Shorea obtuse, S. roxburghii etc.
Main wildlife group, which was found in this area, is mammalia as Indian elephant, sambar deer, common muntjac, banteng, serow, wild boar, Asian wild dog etc.
THE BEAUTIFUL OF NATURE
Khao Sip Ha Chan Waterfall
Namtok Khao Siphachan (ex name is Namtok Nampen) or Namtok Khlongsai is the moderate sized waterfall with 23 levels with stream all year. Far away from Kaenghangmaeo district office about 35 kms which near Sakaeo province. Access and travel is only in dry period. There is natural trail for study that was prepared by National park with about 4.8 kms.
Activities - Waterfall Traveling - Trekking - Nature trail study