Irrigation control system and irrigation control method based on open channels

Abstract

The invention discloses an irrigation control system and irrigation control method based on open channels. The irrigation control system comprises a management module, an index acquisition module, an index analysis module, a water level acquisition module, a water level analysis module and a channel water-injection water-discharge regulation and control module. The channel water-injection water-discharge regulation and control module traverses each main channel and each branch channel from top to bottom in a breadth-first manner by means of a stepping control method, and carries out water-injection and water-discharge control on each main channel and each branch channel in dependence on the channel data and the sluice state of the main channel and the branch channel until the water-discharge amount of all the farmland channels satisfies the water demand of the farmland sides corresponding to the farmland channels. By employing a mode of calculating the water storage amount by a water level gauge, the problem that the flow velocity and flow of the open channel are difficult to control is avoided.

Description

technical field [0001] The invention relates to intelligent irrigation technology. Background technique [0002] With the advancement of agricultural modernization, more and more attention has been paid to intelligent irrigation technology. On the one hand, intelligent irrigation technology can realize on-demand automatic irrigation of crops, which can greatly reduce labor input; on the other hand, intelligent irrigation technology can effectively improve water utilization, thereby achieving the purpose of water saving. [0003] The ideal intelligent irrigation is as disclosed in the patent document CN102037888A by collecting information such as soil humidity, and then judging whether crops need to be irrigated according to the information, and if crops need to be irrigated, the corresponding control valve is opened to control the corresponding crops. for irrigation. But the actual situation cannot be idealized. [0004] At present, the vast majority of farmland in China ...

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Problems solved by technology

This kind of irrigation system based on open channels needs to solve the following problems: 1. Various canals are usually very long and have the function of water storage. Every time the gate is opened to release water, the amount of water at the bottom of the canal must be considered. 2. The flow of water in the canal depends on the natural drop and is not driven by power. When the upstream and downstream water levels are equal, the water flow does not move, so the flow rate and flow are difficult to control; 3. The natural drop between the upstream channel and the downstream channel is large. Small, it is necessary to use the channel sluice switch to store water in the channel to create a water level difference between the upstream and downstream; 4. The irrigation area is large, involving hundreds to thousands of square kilometers of irrigation area, and the cost of collecting soil moisture with sensors all over the place is too high; 5. Due to the large irrigation area, the amount of water required for different soil properties and crop properties in different places is also different; 6. Due to the large irrigation area, even different irrigation points have different precipitation; 7. Covered by branch channels The irrigated area is different, and the sluice gates of each branch channel cannot be treated equally

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