A method and system for predicting the emission of ground source pollution for irrigation and agriculture

Abstract

An embodiment of the present invention provides a method and system for predicting the amount of source pollution discharge from irrigated agricultural land, including: collecting historical precipitation, irrigation amount, single runoff, single leaching amount, and yield of irrigated agricultural land at the target monitoring point. Flow nitrogen and phosphorus concentration data; determine the monthly surface runoff yield, underground leaching yield, and the predicted value of nitrogen and phosphorus concentration in runoff; finally, determine the predicted value of total nitrogen and phosphorus in irrigation runoff. The pollution discharge prediction method provided by the embodiment of the present invention is based on the driving factors and characteristics of farmland non-point source pollution, aiming at the runoff water volume and the concentration of nitrogen and phosphorus in the runoff, respectively establishing monthly surface runoff and underground leaching production flow prediction models and The runoff nitrogen and phosphorus concentration prediction model scientifically predicts the field-scale nitrogen and phosphorus emissions of agricultural land affected by rainfall and irrigation, and solves the problem of unpredictable non-point source pollution emissions of agricultural land affected by rainfall and irrigation. Non-point source pollution prevention and control provided technical support.

Description

technical field

[0001] The invention relates to the technical field of agricultural irrigation, in particular to a method and system for predicting the emission of ground source pollution for irrigation. Background technique

[0002] Irrigated agricultural land refers to agricultural production land that includes both artificial irrigation and natural precipitation as water sources. With the improvement of my country's agricultural intensification and scale, agricultural production is increasingly dependent on chemical fertilizers. In order to pursue relatively high economic benefits, the majority of farmers use excessive chemical fertilizers. After chemical fertilizers exceed a certain range, farmland surplus Nitrogen and phosphorus easily enter the environment and cause non-point source pollution. China is the world's largest producer and user of chemical fertilizers. It feeds 22% of the population with 9% of arable land and consumes 35% of chemical fertilizers. The conseq...

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