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ThesisItem Open Access Water balance study of Karuvannur river basin(Department of Irrigation and Drainage Engineering, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1988) Santosh, G Thampi; KAU; John Thomas, KThis study was undertaken to quantitavely assess the water resources of the Karuvannur River Basin and to study the monthly water balance in order to estimate the balance for ground waterrecharge or depletion during the period 1976 to 1985. The mean monthly rainfall over the basin during the period 1976-1985 was determined by Thiessen polygon method . Data regarding the amount of water released for irrigation from the Peechi reservoir was also collected. Due to lack of data, contribution from other sources was not taken into account. The total runoff from the basin during each month of this period was determined . The various crop combinations in the basin were identified and the area under each of these was estimated . The actual evapotranspiration during each month was estimated using the method outlined by Doorenbos and Kassam. The basin was regarded as an independent hydrologic unit . Hence surface and subsurface inflow and outflow were assumed to be negligible.ThesisItem Open Access Development of a low cost garden tractor(Department of Agricultural Engineering, College of Horticulture, Vellanikkara, 1982) Sivaswami, M; KAU; Muhammad, C PThe study was conducted with the objectives of systematic analysis of components with respect to their kinematics, dynamics and ergonomics and evaluation of traction performance and economics of low cost garden tractor. A greaves Lombardini 5.4 hp diesel engine with 1800 rpm was selected and a simple three step speed reduction system having a single stage V belt drive and double stage chain drives with a pivotted countershaft clutch have been designed. A road speed of 6.635 kmph and field speed of 3.317 kpmh were achieved by using a cone pulley arrangement with 6.00 x 12 size wheel.Correct position of various components bringe the centre of gravity of the unit with and without implement at very close to the final drive axle for easy balancingThesisItem Open Access Development of small scale equipment for extraction of cocoa butter and production of cocoa powder(Department of Agricultural Engineering, College of Horticulture, Vellanikkara, 1982) Ganeshan, V; KAU; George, T PThe primary objective of this project was to evolve a viable technology and equipment system for small scale processing of cocoa beans. The study mainly concentrated on the development of an extraction unit for the separation of butter from cocoa mass. Various equipment required for small scale processing of cocoa beans were either identified or designed.ThesisItem Open Access Modification and performance evaluation of six row rice transplanter for conventional seedlings(Department of Farm Power Machinery and Energy, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1990) Bainu, T Kuzhively; KAU; Sivaswami, MThe work was carried out at the Kelappaji College of Agricultural Engineering and Technology, Tavanur. The six ā row rice transplanter was originally designed for mat type seedlings. Considering the importance of a transplanter using conventional type seedlings, the above transplanter was modified. The modifications were completed in three stages. The performance evaluation of the modified six row rice transplanter was conducted after each stage of modification. The average number of seedlings per hill could be reduced from the average value of six seedlings per hill before modification to 2.27 seedlings per hill after the modifications. The missing hills percentage was brought down from 20.83 per cent to 5.55 per cent and the floating hills percentage was reduced from 10 to 5.55. Percentage of damaged hills was reduced from 23.3 to 8.8. The field capacity of the machine was improved from 0.0139 ha/hr to 0.0162 ha/hr and field efficiency from 48.26 percent to 56.87 per cent. The use of the modified transplanter is profitable if it is operated beyond one hectare per annum. It gives a saving of Rs. 618.00 per hectare compared to the conventional hand transplanting giving a 2. 4 times reduction in total cost. The pay back period of the modified transplanter is 2.24 years when the annual utilization is 2 hectares per annum and 1.13 years when the annual utilization is 3 hectares per annum.ThesisItem Open Access Synthetic generation of streamflow data using computer simulation model(Department of Land and Water Resources and Conservation Engineering, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1993) Leven , K V; KAU; Jobi V, PaulA Study has been made to develop a computer simulation model for the synthetic generation of streamflow data for Chaliyar, one of the larger basins of the state. The data were collected from different river gauging stations for different durations. A suitable mathematical model namely Thomas Fiering Model was developed for the generation of synthetic data. The model was fitted for the observed monthly steamflows. The validity of the model was checked by comparing the statistical parameters of historical and generated data and by comparing the flow duration curves. It is seen that the model preserves various statistical parameters like mean, standard deviation and correlation coefficient. The study reveals that the computer simulation model developed is a very effective tool in the proper management of water resources system.ThesisItem Open Access Sea water intrusion studies for coastal aquifers(Department of Irrigation and Drainage Engineering, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1988) Saley, Abraham; KAU; .John Thomas, KStudies were conducted in three villages along the coastal areas of Trichur district, namely, Nattika, Talikulam and Edamuttam, to know the extent of sea water intrusion through aquifers. Observations were made in existing wells along an alignment normal to the coast line. Aquifer parameters and fresh water flow through the aquifer were computed making use of borehole data available for the region. The positions of the interfaces were determined using established formulae. The possible shifting of the interfaces due to reduction In fresh water discharge consequent to future increased rate of pumping was predicted. In each village, -three wells were taken for the study purpose. In all the cases, the maximum rates of pumping for various depths of wells, which will not cause sea water intrusion problems, have been deterĀ¬mined. Chemical analysis showed that, at present there was no salt water intrusion in the wells under study. The results of the present study lead to a better understanding of the sea water intrusion problem, the determination of the position of the interfaces for various pumping rates might be effectively used in fixing the location of wells, pumping rates and depth of wells. The study would be made use of designing a ground water system in coastal areas for a better utilisation of ground water resources.