Comprehensive Evaluation of Surface Water Quality in the Flood Period of the Yellow River by Various Methods and Theories

Field monitoring of water quality during the autumn flood season in middle and lower reaches Yellow River 2021 was carried out. During this period, a host methods, including single-factor evaluation method, index fuzzy mathematics were utilized to evaluate status. The relevant findings indicate that mainstream tributaries is excellent, which meets function zoning goals. In particular, method emphasizes use single with most serious pollution represent comprehensive category, whereas uses multi-factor contribution rate calculate membership degree quality. Therefore, it superior determining functional zones within scope. Meanwhile, Nemerow Yiluo Qinhe at section entering than mainstream, indicating better period. Overall, results research are conducive objective season, thus providing more scientific technical support for ecological conservation restoration basin.