Manage irrigation soil information using geographic information system

• Main Authors: Xie, Yan Hua, 謝炎樺
• Other Authors: Shi, Jia Chang
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/70043746577220830954

碩士 === 國立臺灣大學 === 農業工程研究所 === 83 === Soil properties (especially soil moisture indices) are key factors in the management of agricultural production system. Soil information， with its spatially distributed characteristics，can be efficiently managed with the geographic information system (GIS). This study is to cooperate the related soil information into a building block for the GIS of agricultural production system. Soil information is vital for irrigation planning. Soil properties for some specific area are usually needed in the planning process. Three methods are used in this study to get soil information for any arbitrary area： (1) weighted average using the distance form the nearby soil sampling points. (2) interpolation form the soil property contour.and (3) interpolation form the sand/clay percentage contours. The sand/clay percentage are then used for the prediction of soil moisture indices. The study also persents a method for examination of the efficiency and adequacy of the density and distribution of soil sampling points.