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Subari Subari
Balai Irigasi, Puslitbang SDA
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Land Grading dengan Metode Plane of Best Fit untuk Pencetakan Sawah Baru Damar Susilowati; Subari Subari; Muhammad Muqorrobin
Jurnal Irigasi Vol 7, No 1 (2012): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (984.174 KB) | DOI: 10.31028/ji.v7.i1.16-27

Abstract

To optimize the volume of cut and fills need to carry out Land Grading for new completed irrigation, therefore this report will discuss land grading for surface irrigation and its benefits and reasons for carrying this out. This report examines Land Grading using Plane of Best Fit method that have been used, with its advantages and disadvantages. Most of the advanced country conducted Land Consolidation for the new completed irrigation project. From the research result (Damar S., 1987) shows that Plane of Average Profile Method suitable for the area that have been consolidated, while Least Square Method can be used for any shape area. This report also covers some important factors that can seriously affect the costs of land grading such as suitability of site. This report discusses land grading by Plane of Best Fit Method using computer programs that is developed from Plane Method, because it is the fastest and most accurate results that can be achieved.
Pengaruh Perlakuan Pemberian Air Irigasi pada Budidaya SRI, PTT dan Konvensional terhadap Produktivitas Air Subari Subari; Marasi Deon Joubert; Hanhan Ahmad Sofiyuddin; Joko Triyono
Jurnal Irigasi Vol 7, No 1 (2012): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (971.503 KB) | DOI: 10.31028/ji.v7.i1.28-42

Abstract

The limitedness water availability and increased water needs can cause a conflict of interest in water allocation. Thus, efforts to save water usage needs to be done, especially for rice cultivation that requires a lot of water. Therefore, alternative irrigation and rice cultivation technology which can save water need to be investigated. Water savings in practice can be done by changing the pattern of irrigation in the field without reducing the production, i.e. by reducing the amount of water for the land preparation period and plant growth period. The study was conducted to determine the water productivity of different irrigation and paddy cultivation method (i.e. the SRI method, ICM and conventional) in the from of research demonstration plot. This paper presents the results of these studies, especially regarding water productivity in each irrigation and paddy cultivation method. The results showed irrigation water requirement during land preparation on SRI 22-47 mm; ICM 24-47 mm and conventional 30-68 mm. During the growth period, water consumption in the conventional cultivation is the highest with a mean of 577 mm. Other cultivation treatments showed lower results, i.e. SRI 324 mm and ICM 544 mm, and water productivity for SRI=1,9 Kg/m3; ICM=1,1Kg/m3 and for conventional = 1,0Kg/m3.
Co-Authors Damar Susilowati Hanhan Ahmad Sofiyuddin Joko Triyono Marasi Deon Joubert Muhammad Muqorrobin