A STUDY OF FACTORS AFFECTING THE CONSTRUCTION EFFICIENCY OF IRRIGATION DAM: A CASE STUDY OF LOCAL GOVERNMENT ORGANIZATIONS IN THE LOWER NORTHERN PROVINCE AREAS

Abstract

This study is research of factors affecting of the construction efficiency of irrigation dam for a case study of local administration in the lower northern areas of Thailand. In 2019, the lower northern has 4 areas of irrigation dam, using estimated budget 1,370,000 Baht and having benefit areas more than 7.5 million square meters. Basically, the construction of irrigation dam can not know the efficiency due to construction work, how is the material resource used in construction and the benefits to be received. Therefore, the mathematic model analysis is applied to calculate the efficiency of production by using Data Envelopment Analysis or DEA via the Solver tooling in Microsoft Excel for solve this problem. The factors of production are cost of materials and labors. The factor of product is areas, which get the benefit and size of irrigation dam. It is found the value of the Technical Efficiency and Allocative Efficiency of each areas are totally difference.

The results of technical efficiency (TEcrs) of 8 irrigation dam project have the technical efficiency in unit percentage is 68.0, 51.5, 70.8, 48.5, 50.5, 54.3, 87.0 and 84.0 respectively. The average value is 64.3 percent. The results Allocative Efficiency (AE) of 8 irrigation dam project have the Allocative Efficiency in unit percentage is 67.3, 71.8, 70.8, 58.0, 58.0, 56.3, 68.0 and 72.0 respectively. The average value is 65.3 percent. The lowest efficiency dam is 56.3 and the highest efficiency dam is 72.0 and the ratio between the present value Benefit Cost Ratio (B/C) of the irrigation dams in 4 areas are 36.62, 23.05, 29.94 and 18.66 respectively. The average value is 27.072 that mean it has economic worthiness. There are 4 agriculture areas, where are received the directly benefit including: Mae Poen district, Krok Phra district, Chum Ta Bong district and Mae Wong district.