Method for evaluating groundwater pollution risk of reclaimed water irrigation

Abstract

The invention discloses a reclaimed water irrigation groundwater pollution risk assessment method, comprising the following steps: (1) acquiring water quality data Z and water level data L through monitoring points; (2) obtaining the infrared spectrum of the water source to be evaluated by a remote sensing infrared spectrum camera, and performing Fourier transform on the infrared spectrum to obtain the absorbance A; (3) loading geographic data through a three-dimensional engine, wherein the geographic data comprises a number C of factories, an elevation data E and a crowd amount P of an area to be evaluated; (4) taking the data collected in the steps (1), (2) and (3) into the pollution risk assessment model for risk assessment grade F; As that detection data of the monitor point and the absorbance obtained by the infrared spectrum are combine with the depth of the groundwater to calculate the grade of the pollution source, the probability of the groundwater being polluted can be obtain, and the groundwater is periodically detected at the place where the pollution source is high, the groundwater is prevented from being polluted and renovated, and the groundwater is prevented in advance.

Description

technical field [0001] The invention relates to a groundwater pollution risk assessment method, in particular to a groundwater pollution risk assessment method for reclaimed water irrigation. Background technique [0002] Under the situation of increasingly scarce water resources, recycled water plays an important role in agricultural irrigation. It is estimated that the area of ​​sewage irrigation in the world reaches about 20 million hm 2 , and listed recycled water irrigation as an important measure to solve the water crisis (FAO, 2012). Israel, Australia, Tunisia and other reclaimed water will respectively reach 25%, 11% and 10% of the total demand for water resources (Lazarova, 2001). Australia's Werribee farm has been using recycled water for irrigation since 1897 (McPherson, 1979), and 42% of the recycled water in the United States is used for agricultural irrigation. my country's reclaimed water irrigation has also achieved rapid development in recent years, and is...

AI Technical Summary

Problems solved by technology

[0004] (1) There are few reports at home and abroad on in-situ layered monitoring experiments on groundwater pollution by reclaimed water irrigation. There is a lack of experimental data support for the infiltration and recharge mechanism of reclaimed water irrigation and the selection of characteristic pollutants. The pollution load quantification is mainly based on land Using the type as the input risk or using nitrogen as the characteristic pollutant for spatial superposition to obtain the pollution risk map; (2) Although there are many research results on the optimization of the parameters of the DRASTIC model for the evaluation of groundwater antifouling performance, the rationality of the parameter scoring There are relatively few studies on the quality of reclaimed water, and there are few studies on the improvement of parameter scoring methods, and the improvement of the model lacks corresponding statistical data support; (3) A set of water quality characteristics for reclaimed water and consideration of pollutant toxicity, mobility, and degradation have not yet been established. Risk assessment method for groundwater pollution with characteristics of reclaimed water irrigation