West region of Thailand have mainly from the area North of mountainn high such as the tanaosri mountain in the mountain ran ge, these are sources of major rivers Such as Patchaburi River Prachinburi River and many large rivers. In addition have many high mountain. Region topography have 2 river basin ที่ราบชายฝั่งทะเลด้านอ่าวไทย such as (เพชรบุรี ประจวบคีรีขันธ์) จึงมีการขนส่งทางเรือค่อนข้างเยอะ