Your search found 602 records
1 Litwiller, K. E.; Tinsley, R. L.; Deweeb, H. H.; Ley, T. W. 1984. Infiltration studies on Egyptian vertisols. Cairo: Egypt Water Use and Management Project. ix, 66p. (EWUP technical report no.57)
Infiltration ; Soil water ; Water table ; Surface drainage ; Water distribution ; Water management / Egypt
(Location: IWMI-HQ Call no: 631.7.2 G232 LIT Record No: H037)
Twenty-one cylinder infiltration tests were conducted during irrigation of wheat on the shrinking/swelling vertisol soils of Kafr El-Sheikh, Egypt. Infiltration rates decreased rapidly from 720 mm/ hr for the first minute to 7.2 mm/hr at 2 hours elapsed time, with 1/3 of the tests showing soil sealing. In the majority of tests a well-defined two phase cumulative infiltration curve was determined. Significant correlations of antecedent soil moisture content in the 0-100 mm and 0-200 mm soil depth at the phase change, and average infiltration rate during the first phase were found. The first phase of infiltration was considered to represent flow of water through the soil macropores in the drier upper layer and water through the soil macropores. The second phase represented vertical flow into the wetter lower soil layers and filling of the finite storage space above the high water table. The analysis indicated a design application depth for wheat of not less than 120 mm for the first irrigation and 55 mm for subsequent irrigations under prevailing Abu Raya irrigation practices. Good water distribution across the field was facilitated by low long-term infiltration rates and high water table conditions. With the low second phase infiltration rates, water ponded in field depressions for prolonged periods could be detrimental to crops and requires provision for surface drainage. Precision land levelling would reduce this hazard.
2 Sing, J.; Agnihotri, S. 1984. Water harvesting technology for cultivation of French Bean in Kenya. In M. J. Blackie, Ed., African Regional Symposium on Small Holder Irrigation, 5-7 September 1984 (pp. 123-133). London: Hydraulics Research Ltd.
Moisture stress ; Soil moisture ; Infiltration ; Irrigated farming ; Beans (phaseolus) ; Phaseolus vulgaris / Kenya
(Location: IWMI-HQ Call no: 631.7.3 G100 BLA Record No: H0205)
French bean (Phaseolus Vulgaris variety Vernondon) was introduced in Kenya to increase the income of small farmers and encourage export of vegetables. At present, there are 4,000 farmers each cultivating an area of 170 m around Lake Victoria where suitable soil and climatic conditions exist, covering a total cropped area of 150 ha during 1982-83. Analysis of rainfall data, variation of soil moisture and infiltration characteristics indicated that: 1) normally the average intensity of rainfall exceeds the rate of infiltration up to 200 minutes, thus allowing runoff to be harvested; and 2) at a probability level of rainfall equal to or greater than 50%, there is moisture stress in all the months except April and May. The conditions for the most economical dimensions of a frustum of a square base pyramid were determined by mathematical analysis. The dimensions for two sides slopes 0 = 45 degrees and 0 = 60 degrees were calculated. The cost of plastic lining varies from Sh300 to Sh600 for a storage volume of 10 to 20 m.
3 Kundu, S. S.; Skogerboe, G. V. 1980. Field evaluation of methods for measuring basin irrigation performance. Fort Collins, CO, USA: Colorado State University. xviii, 118p. (Water management technical report no.59)
(Location: IWMI-HQ Call no: 631.7.8 G000 KUN Record No: H0345)
A detailed description of field procedures employed to obtain necessary data for evaluating basin irrigation performances of several irrigation events is outlined. Two analytical techniques are described and used for calculating infiltrated water depths through station-areas delineated by a grid system within the basin. Both techniques require an infiltrometer test and infiltration opportunity time of each station-area during an irrigation event. A modified volume balance technique is described and is used to develop an infiltration equation which should represent the actual infiltration characteristics of the entire basin during an irrigation event. The infiltrated water depth of each station-area is also calculated by using the infiltration equation developed by this method. All three methods are used for measuring basin irrigation performance and their applicability for measuring performance parameters is compared.
4 Kraatz, D.; Stoutjesdijk, J. 1984. Self-help irrigation schemes in Malawi. In M. J. Blackie (Ed.), African Regional Symposium on Small Holder Irrigation, 5-7 September 1984 (pp. 77-86). London, UK: Hydraulics Research Ltd.
Infiltration ; Gravity flow ; Rain-fed farming ; Rice ; Farmers' associations ; Canals ; Farmer managed irrigation systems / Malawi
(Location: IWMI-HQ Call no: 631.7.3 G100 BLA Record No: H01603)
5 Ayers, R. S.; Westcot, D. W. 1985. Water quality for agriculture. Rome, Italy: FAO. xii, 174 p. (FAO irrigation and drainage paper no. 29 Rev. 1)
(Location: IWMI-HQ Call no: 631.7.2 G000 AYE Record No: H01372)
6 Oliveira, C. A. S.; Hanks, R. J.; Shani, U. 1987. Infiltration and runoff as affected by pitting, mulching and sprinkler irrigation. Irrigation Science, 8(1):49-64.
(Location: IWMI-HQ Call no: PER Record No: H02916)
7 Miller, D. E.; Aarstad, J. S.; Evans, R. G. 1987. Control of furrow erosion with crop residues and surge flow irrigation. Soil Science Society of America Journal, 51(2):421-425.
(Location: IWMI-HQ Call no: PER Record No: H02999)
8 Skaggs, R. W.; Miller, D. E.; Brooks, R. H. 1983. Soil water. Parts 1 & 2 : Properties, dynamics. In Jensen, M. E. (Ed.), Design and operation of farm irrigation systems. St. Joseph, MI, USA: ASAE. pp.77-142. (ASAE monograph no. 3)
(Location: IWMI-HQ Call no: 631.7.1 G000 JEN Record No: H03201)
9 Smerdon, E. T.; Blair, A. W.; Reddell, D. L. 1988. Infiltration from irrigation advance data - I: Theory. Journal of Irrigation and Drainage Engineering, 114(1):4-17.
Surface irrigation ; Infiltration ; Mathematical models ; Irrigation efficiency ; Mathematical models
(Location: IWMI-HQ Call no: PER Record No: H03538)
10 Blair, A. W.; Smerdon, E. T. 1988. Infiltration from irrigation advance data - II: Experimental. Journal of Irrigation and Drainage Engineering, 114(1):18-30.
(Location: IWMI-HQ Call no: PER Record No: H03539)
11 Holzapfel, E. A.; Mari¤o, M. A.; Valenzuela, A.; Diaz, F. 1988. Comparison of infiltration measuring methods for surface irrigation. Journal of Irrigation and Drainage Engineering, 114(1):130-142.
(Location: IWMI-HQ Call no: PER Record No: H03547)
12 Blair, A. W.; Smerdon, E. T. 1987. Modeling surge irrigation infiltration. Journal of Irrigation and Drainage Engineering, 113(4):497-515.
(Location: IWMI-HQ Call no: PER Record No: H03676)
13 Killen, M. A.; Slack, D. C. 1987. Green-Ampt-model to predict surge irrigation phenomena. Journal of Irrigation and Drainage Engineering, 113(4):575-584.
(Location: IWMI-HQ Call no: PER Record No: H03671)
14 Yu-Si, F.; Shan-hsin, C. 1987. Upward infiltration equations in power-law form. Journal of Irrigation and Drainage Engineering, 113(4):595-601.
(Location: IWMI-HQ Call no: PER Record No: H03669)
15 Trout, T. J.; Garcia-Castillas, I. G.; Hart, W. E. 1982. Soil water engineering field and laboratory manual. Fort Collins, CO, USA: Colorado State University. vi, 193p.
(Location: IWMI-HQ Call no: 631.7.1 G000 TRO Record No: H02414)
16 Turbak, A. S.; Morel-Seytoux, H. J. 1988. Analytical solutions for surface irrigation. I: Constant infiltration rate; II: Variable infiltration rate. Journal of Irrigation and Drainage Engineering, 114(1):31-47; 48-60.
(Location: IWMI-HQ Call no: PER Record No: H03724)
17 Maheshwari, B. L.; Turner, A. K.; McMahon, T. A.; Campbell, B. J. 1988. An optimization technique for estimating infiltration characteristics in border irrigation. Agricultural Water Management, 13(1):13-24.
(Location: IWMI-HQ Call no: PER Record No: H04256)
18 Trout, T. J.; Mackey, B. E. 1988. Inflow-outflow infiltration measurement accuracy. Journal of Irrigation and Drainage Engineering, 114(2):256-265.
(Location: IWMI-HQ Call no: PER Record No: H04395)
19 Singh, V. P.; Wickham, T. H.; Cropuz, I. T. 1978. Nitrogen movement to Laguna lake through drainage from rice fields. Paper presented at the International Conference on Water Pollution Control in Developing Countries, Bangkok, Thailand, 21-25 February 1978. 7p.
(Location: IWMI-HQ Call no: P 232 Record No: H04440)
20 Yardeni, A.; Rubinstein, Z. 1986. Development of a dynamic mini-sprinkler with high clogging resistance. In Advances in irrigation and water supply. Tel Aviv, Israel: Israel Water Commission. pp.53-56.
Sprinkler irrigation ; Water distribution ; Technology ; Irrigation efficiency ; Design ; Infiltration
(Location: IWMI-HQ Call no: 631.7 G000 ADV Record No: H03857)
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