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Canal Comes Alive with Lighted Boat Parade.

Irrigation Water Requirement of Crops

It is defined as, "The quantity of water required by a crop in a given period of time for normal growth under field conditions." It includes evaporation and other unavoidable wastes. Usually water requirement for crop is expressed in water depth per unit area. The first thing you need to

Importance of Irrigation Engineering

In the next 35-45- years, world food production will need to double to meet the demands of increased population. 90% of this increased food production will have to come from existing lands. 70% of this increased food production will have to come from irrigated land

Evapotranspiration Measurement by Blaney Criddle & Hargreaves

The estimation of potential evapotranspiration is achieved by adopting empirical approaches, such as the Thornthwaite equation, the Blaney-Criddle formula and the Hargreaves method, all having as a requirement the availability of temperature data. The data set is made up of temperature time series, obtained

Methods & Techniques of Irrigation

The pressurized systems include sprinkler, trickle, and the array of similar systems in which water is conveyed to and distributed over the farmland through pressurized pipe networks. There are many individual system configurations identified by unique features (centre-pivot sprinkler systems). 2. Gravity Flow Irrigation Systems convey and distribute water at the field

Choice and Selection of Irrigation Methods

The type of irrigation system selected is an important economic decision. Some types of pressurized systems have high capital and operating costs but may utilize minimal labour and conserve water. Their use tends toward high value cropping patterns. Other systems are relatively less expensive to construct and operate but have high labour requirements. Some

Types of Tube wells

In design, find its length, slot size, opening area, diameter and material requirements Corrosion resistant Strong enough to prevent collapse Prevent excessive movement of sand into well Materials used for Tube Well Construction Zinc free brass Stainless steel Low carbon steel High copper alloy

Advantages and Disadvantages of Surface Irrigation Methods

Surface irrigation is the introduction and distribution of water in a field by the gravity flow of water over the soil surface. The soil acts as the growing medium in which water is stored and the conveyance medium over which water flows as it spreads and infiltrates. Common surface irrigation systems used are rill irrigation, furrow or border irrigation. The term 'surface

Construction of Water Wells

A water well is a lot more than a drilled hole, but for many people, the above ground part of the drilling process is the only part they see. A water well is a specially engineered hole in the ground; For ground water monitoring, or for scientific research purposes, wells may be drilled in a way that allows the specialists to closely examine the rock formations and take

Types of Strainers in Wells

Following are the types of strainers used in water wells: Cook strainer Browlie Ashford Leggett Phoenix Layne and brownlie

Design Of Non Erodible Channels

The Initial dimensions of a channel are determined by uniform flow or manning formula. But final dimensions are determined on the basis of 1. Hydraulic efficiency 2. Empirical rule of the best section. 3. Practicability And Economy

Causes, Importance And Prediction of Flood

Flood is a natural even which has always been an integral part of geological history of earth. It occurs along rivers, streams and lacks. Most of the hydraulic are designed on flood record. Small hydraulic structures are based on a minimum of 25 years flood records e.g all structure constructed in the canal, soil conservation practices etc. Large irrigation projects are based on 100

Uses & Effects of Canal Irrigation

Irregular supply of water in the rivers is then regulated by construction of dams & barrages. Canal system irrigates a vast area. Even the deserts have been made productive. Cheap labour and availability of cement reduces the cost of canal construction. Huge quantities of water from Monsoon rainfall & melting of snow can be stored in reservoirs during

Factors Affecting Crop Water Requirements

A certain crop grown in a sunny and hot climate needs more water per day than the same crop grown in a cloudy and cooler climate. There are, however, apart from sunshine and temperature, other climatic factors which influence the crop water need. These factors are humidity and wind

Classification of Irrigation Schemes

Irrigation Projects include storage dams, diversion works, barrages, lift irrigation schemes and tube wells. Irrigation Projects are divided into the following three categories viz., Major, Medium and Minor Projects. The criteria of classification is as under: Projects having CCA more than 10,000 ha. are classified as Major Projects Projects having CCA more than 2000 ha.

Mathematical Relation Between Duty, Delta and Base Period

If the soil of the canal bed is porous and coarse grained, it leads to more seepage loss and consequently low duty. If it consists of alluvial soil, the percolation loss will be less and the soil retains the moisture for longer period and consequently the duty will be high. Let, Duty = D (hectares/cumecs), Delta = A meters Base period = B days By definition, One cumec

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