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008			120698 th eng
035			_a.b10189105
099		9	_aAIT Thesis no.WA-90-24
100	1		_aMehta, Brijesh Kumar
245	1	0	_aDesign and operation of on-farm storage facilities for demand oriented irrigation scheme
260			_aBangkok : _bAsian Institute of Technology, _c1990
300			_a115 p.
490	1		_aThesis ; _vno. WA-90-24
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1990
520			_aIn irrigation systems, water demand usually shows large fluctuations due to rain, crop growth, non-availability of labor etc., which water supply can not follow. It may lead to over- and under- irrigation and result in low water use efficiency, Hence irrigation system should be designed to satisfy fluctuating water demand and at the same time prevent invalid overflow. On-farm storage facilities are expected to be useful for this purpose. In this study irrigation system is assumed to consist of an intermediate reservoir (regulating reservoir, IR) and a chain of internal water storage facilities (farm ponds, FP). The purpose of a farm pond is to smoothen daily fluctuations whereas an intermediate reservoir balances seasonal fluctuations of irrigation water demand. The FP model was developed for determination of storage capacity and operation rule of a farm pond, at various conditions such as cropping pattern, area of command, hourly irrigation demand, and at various reliability levels. For operation of farm pond four operating rules were formulated and out of them best one was selected for the present study. The IR model was also developed for determination of storage capacity of intermediate reservoir at various reliability levels. These FP and IR models were applied to Mae-Taeng Irrigation Project in Chiang Mai Province, Thailand. The storage capacities of farm ponds and intermediate reservoir were determined under various cropping patterns, hourly demand patterns, for various reliability levels. It was confirmed that both farm pond and intermediate reservoir can increase water use efficiency and decrease deficit. It was also observed that a good operating rule can give less required storage capacity. It was found that storage capacity of farm pond is governed by both wet and dry season crops. For various parameters of ARMA model for generation of water demand, about 5 to 10% variation in the storage capacity was observed. However 10 to 20% variation in storage capacity was observed due to hourly demand variatio
650		0	_aWater-storage _xDesign and construction
700	1		_aGoto, Akira, _eChairperson
700	1		_aMurty, V.V.N., _eExamination Committee
700	1		_aPaudyal, Guna N., _eExamination Committee
710	2		_aGovernment of Japan, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WA-90-24
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B18602
907			_a.b10189105 _bmnait _cs
902			_a240411
998			_b2 _c951012 _dm _ea _fs _g0
945			_lmnait
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942			_c22
942			_c40
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