The Yihe River and Luohe River were used to elucidate this concern because of the spatially heterogeneous land usage. Hydrochemical compositions, water isotope ratios (δD-H2O and δ18O-H2O), and δ15N-NO-3 and δ18O-NO-3 values had been employed to constrain the NO-3 resources and transformations suffering from different land use types. The outcome indicated that ① the mean nitrate levels when you look at the Yihe River and Luohe River waters were 6.57 and 9.29 mg·L-1, the mean values of δ15N-NO-3 had been 9.6‰ and 10.4‰, additionally the average δ18O-NO-3 values were -2.2‰ and -2.7‰, respectively. On the basis of the analysis of δ15N-NO-3 and δ18O-NO-3 values, the NO-3 in icultural tasks elevated the downstream. Consequently, more attention must be compensated to aim origin pollution therapy, as well as the high-quality development of environmental civilization into the 5-Bromo-2′-deoxyuridine Yellow River Basin should always be maintained.To explore the pollution traits and threat levels of antibiotics in liquid of the Beiyun River Basin in Beijing, the concentration of antibiotics was analyzed by using the solid-phase extraction and high-performance liquid chromatography-tandem size spectrometry (SPE-HPLC-MS/MS) technique. The outcomes revealed that seven types of four categories of antibiotics were recognized into the samples from 12 sampling points; the sum total concentration of antibiotics including sulfapyridine, clarithromycin, azithromycin, roxithromycin, erythromycin, ofloxacin, and lincomycin ranged from 59.19 to 703.44 ng·L-1. Among these antibiotics, the detection rate of clarithromycin, azithromycin, roxithromycin, ofloxacin, and lincomycin was 100%; that of erythromycin was 41.67%; and therefore of sulfapyridine ended up being 33.33%. Weighed against that in some streams in China, the Azithromycin, Erythromycin, and Clarithromycin in the Beiyun River Basin had been at a comparatively high-level. The ecological risk evaluation results indicated that more painful and sensitive species was algae. The wellness danger quotients indicated that sulfapyridine, lincomycin, roxithromycin, azithromycin, and erythromycin presented no risk for every age group, whereas the health chance of clarithromycin was at a reduced level.Taipu River is a river spanning two provinces and another town in a demonstration location into the Yangtze River Delta on an ecologically friendly developmentand an important liquid supply in the top achieves associated with Huangpu River in Shanghai. To comprehend the multi-media circulation attributes, air pollution condition, and ecological danger of heavy zoonotic infection metals in the Taipu River, the items of hefty metals (since, Cd, Co, Cr, Cu, Mn, Ni, Pb, Sb, and Zn) in the sediments of Taipu River were analyzed, and the air pollution status and potential ecological risk had been assessed with the Nemerow comprehensive pollution index, geo-accumulation list, and possible environmental risk index methods. In addition, the wellness threat evaluation model ended up being utilized to assess the wellness risk of heavy metals in surface liquid of Taipu River. The outcome revealed that the concentrations of Cd, Cr, Mn, and Ni when you look at the area liquid of Taipu River exceeded the course Ⅲ water limit at the upstream point in springtime; the levels of Sb surpassed the class Ⅲ watedle reaches of Taipu River had been greater than that of the top of and reduced reaches, as well as the Sb air pollution had been much more serious. The possibility ecological risk list strategy disclosed that the Taipu River deposit is at a decreased danger. Cd had a high contribution both in the damp and dry periods and might be seen as the key hefty metal of potential environmental threat within the Taipu River sediment.The Wuding River Basin is a first-class tributary associated with the Yellow River, plus the high quality of their water ecological environment features a profound affect the ecological defense and high-quality development of the Yellow River Basin. To be able to determine the origin of nitrate air pollution in the Wuding River Basin, surface water examples of the Wuding River had been gathered from 2019 to 2021, in addition to temporal and spatial circulation traits and influencing factors of nitrate focus in area water in the basin were explored. Nitrogen and oxygen isotope tracer technology and the MixSIAR design had been used to enterovirus infection qualitatively and quantitatively determine the sources of surface water nitrate and their particular share prices. The results indicated that there have been considerable spatial and temporal variations in nitrate concentrations in the Wuding River Basin. With regards to time, the mean concentration of NO-3-N in surface liquid when you look at the wet season ended up being more than that within the flat-water period; spatially, the mean concentraeven rivers in arid and semi-arid regions.In purchase to explore the hydro-chemical evolution legislation regarding the Yarlung Zangbo River Basin from 1973 to 2020, the hydro-chemical qualities and significant ion resources were examined making use of a Piper diagram, Gibbs drawing, ion proportion, and correlation analysis, in addition to irrigation applicability of the Yarlung Zangbo River had been assessed with the sodium adsorption proportion (SAR), sodium percentage (Na+%), and permeability index (PI). The outcomes indicated that the mean value of TDS was (208.30±58.26) mg·L-1, which enhanced over time.