ความสัมพันธ์ระหว่างราคาค่าก่อสร้าง-ปริมาณน้ำเก็บกัก-พื้นที่ชลประทาน สำหรับโครงการขนาดเล็กในภาคตะวันออกเฉียงเหนือ

Abstract

For small reservoir or tank projects with irrigation objective constructed over 2521-2522  B.E. within the 4^th regional office of the Royal Irrigation Department , of 18 projects selected for the analysis the following relationships are resulted :

C = 0.745 + 0. 505 V

C = 0 .597 + 0. 00113 A

and             V = 0.00997 + 0 .00172 A

where C is the construction cost in million baht , V is the storage volume in million of cubic meter s, and A is the irrigatable area in rais. The consta nt and coefficient of the cost relationships can be interpreted as fixed or initial cost of the project and variable or unit cost respecti- vely. The physical relation, the constant is the minimum storage or unusable storage and the coefficient can be interpreted as volume available per rai for irrigation. The values estimated or the regression analysis with the least square principle. Note that the construction cost Of the project does not included the distribution system.