a universal index suitable to multi-parameter water quality evaluation was presented, as the monitoring values of parameters in the water quality index formula in logarithm function form were replaced by their relative values, and optimizing the parameters of different indices in the formula was carrie...
The Malaysian Department of Environment developed an WQI in 1997 as illustrated by53 which used six water quality parameters (DO, BOD5, COD, TSS, ammonia, pH). All six parameters are used in this study to determine the value of WQI. The WQI formula used by Malaysia is as follows. $$ ...
Monte Carlo-CWQI for water quality evaluation According to the water quality monitoring data of each section, a series of single-factor pollution index values were calculated by formula (2) and then the natural logarithmic transformation was performed. After the Kolmogorov–Smirnov test, the transform...
In the TWQI Method, the weighting factors ("Wi") were calculated, taking into account the toxic levels of each parameter and the hierarchical tables of water quality depended on the sum of number of parameters surveyed (2≤n≤100) were all calculated by theoretical formulae, and ...
基于水环境信息规范变换的水质普适指数公式 Universal index formulae of water quality based on normalized transformation of water environment information 文档格式: .pdf 文档大小: 644.14K 文档页数: 10页 顶/踩数: 0/0 收藏人数: 0 评论次数:
(7) the formula for the calculation is:(8)y=Kβk=X(Vβk)=Xβx Finally, we can derive the following expression:(9)βx=Vβk 3.4. WQS classification This section demonstrated the development of a classification model to classify water quality status. The water quality status is divided ...
The calculation formula is shown in Equation (1). The correlation coefficient value ranges from − 1 to + 1. The closer the absolute value to 1, the greater the correlation between the two variables. Moreover, the strength of the correlation is divided into five main levels according to ...
The water quality index (WQI) has been used to identify threats to water quality and to support better water resource management. This study combines a machine learning algorithm, WQI, and remote sensing spectral indices (difference index, DI; ratio inde
compute the elements of the weight vector x. Following that, the sampling process is finished in two steps. The first step is to select one of the Gaussian functions that comprise the Gaussian kernel PDF. The following formula expresses the probability of selecting the\({l}\)th Gaussian ...
The Euclidean distance (D2) is the geometric between two objects and can be calculated by the given formula: [Math Processing Error]D2=(ZEC1−ZEC2)2+(ZHTDS1−ZTDS2)2+(ZPH1−ZPH2)2+(ZCa2+1−ZCa2+2)2+⋯ (9) The dendrogram for cluster analysis of 31 water samples are ...