Rainfall intensity-duration-return period equations and nomographs on regional basis are required in the country for design of soil conservation and runoff disposal structures and for planning flood control projects. The significance of rainfall intensity-duration-return period analysis is also important from economic consideration. An over designed structure involves excessive cost and under designed structure will be unsafe and also involve high recurring in expenditure on repair, maintenance and replacement. An appropriate design would provide a structure with reasonable initial and...

Mini-sprinklers of Rain port were selected for the performance test. The performance evaluation for mini-sprinklers was carried out for height of 1m. The estimated value of uniformity coefficient was found to be in the good range of 76 to 91percent for mini-sprinkler. The uniformity coefficient decreases with increase in mini-sprinkler spacing and increases with increases in mini-sprinkler pressure. As spacing increases from 3m x 3 m to 7m x 7 m the distribution uniformity decreases from 89 to 81% for mini-sprinklers, respectively. As pressure increases from 1.5kg/cm2 to 2.0kg/cm2...

A linear programming model was developed considering two specific objectives viz., net benefit maximization and optimal area allocation. Land available, water available, and food requirement are the constraints considered for model. The model was run at 70 per cent, 80 per cent, 90 per cent and 100 per cent availability levels of storage's excluding different water losses. The optimal cropping pattern indicated that net benefit and area are increased as water availability level increases. For Right bank canal of 965 ha ICA at 70 per cent, 80 per cent, 90 per cent and 100 per cent water...

The experimental field area was 540 m2 (30 m x 18 m). The experiment was arranged in Split-Plot Design with three irrigation levels (I1: 0.6 ETc, I2: 0.8 ETc and I3:1.0 ETc) in the main plots and mulching levels (M1: without mulch, M2: dry grass mulch, M3: silver mulch and M4: black polythene mulch) in the sub plots. Treatments were replicated four times. Each replication had twelve treatment combinations. The total depth of water applied in irrigation levels I1, I2 and I3 were 17.86 cm, 22.98 cm, and 28.09 cm, respectively. The maximum water saving (36.44 per cent) was achieved in irrigation...