关键词: 旱地, 旱地, 冬小麦, 覆盖模式, 土壤温度

Abstract:

The concentrations of heavy metal, including chromium, manganese, lead, nickel, hydrargyrum, iron, copper, cadmium, zinc, arsenic in a certain reclaimed water were determined by ICP-AES technique. The cluster analysis of SPSS was applied to the study of that datas measured by ICP-AES and its analysis results showed that the ten elements could be clustered reasonably into four groups. With principal component analysis, three principal components, the water quality of the sewage, the stability of the CASS, and the sludge-water separation and ceramic filtration, were extracted from the original datas. The water quality of the sewage is the main factor. The application of the two data processing tools were helpful for the sewage treatment plant, which could provide some guidance in the monitoring of water quality and controling of water system operation.