| Using the method to control the clogged experiment, under the condition of constant working pressure, has analyzed the influence rule of the emitter clogged rate, clogged location to the irrigation uniformity. The test results showed that: When the working pressure was changed at the 4 to 10 m, the influence of pressure to the irrigation uniformity was not obvious, as the change range was less than 1%. So in the production practice, the working pressure of the trickle irrigation line can be properly decreased to achieve the purpose of reducing the cost. It is found that the emitter clogged rate was the main reason for affecting the irrigation uniformity, the higher emitter clogged rate, the poorer irrigation uniformity. When the emitter clogged rate is high than 10%, the irrigation uniformity CU will be more less than the minimal value in the code. So only the emitter clogged rate was less than 10%, the logged position will be a certain influence to the irrigation uniformity. When the emitter clogged position distributed at the first one-third section and along entire line, the influence to the irrigation uniformity will be rather obvious, right now the irrigation uniformity will be the minimum. |