Water quality target management in watershed is the fundamental choice of city rivers suffering both serious pollution and severe water shortage. In this study, we performed a case study regarding river pollution cont...Water quality target management in watershed is the fundamental choice of city rivers suffering both serious pollution and severe water shortage. In this study, we performed a case study regarding river pollution control plan based on water quality target management in the North Canal River catchment of Beijing section, in order to obtain effective water quality improvement programs. The ammonia nitrogen (NH3-N) and chemical oxygen demand (COD) were taken as the main controlling pollutants. Water quality targets and basic water quality improvement scenarios were set up considering different intensities of population regulation scenarios and gradually strengthening emission control measures. The MIKE11 model was adopted to simulate the effects of a range of water quality improvement scenarios. Results indicated that the basic scenarios could dramatically improve the surface water environment. However, additional intensive and combined measure programs should be implemented to ensure that the water quality would basically meet the targets of corresponding water function zones. The results highlight the need to implement water conservation in water shortage urban river basin and show the importance of enhancing drainage communication and conducting ecological water replenishment in such kind basins. It is expected to provide a reference for the water environment management practice of other metropolis in the world facing both crisis of water resource shortage and water environment pollution.展开更多
子宫颈癌在欧洲已不常见,但仍是一个主要的公共卫生问题。手术是子宫颈癌的主要治疗手段之一,其质量控制有助于降低术后并发症的发生率和治疗成本,为多学科综合管理的重要组成部分,因此,实施质量管理计划可提高子宫颈癌患者的生存率。2...子宫颈癌在欧洲已不常见,但仍是一个主要的公共卫生问题。手术是子宫颈癌的主要治疗手段之一,其质量控制有助于降低术后并发症的发生率和治疗成本,为多学科综合管理的重要组成部分,因此,实施质量管理计划可提高子宫颈癌患者的生存率。2020年1月8日《国际妇癌杂志》(International Journal of Gynecological Cancer)发表了《欧洲妇科肿瘤学会子宫颈癌手术治疗质量指标》,了解欧洲子宫颈癌手术质控内容和流程,对于我国子宫颈癌的治疗工作有参考价值,现对其进行简要解读。展开更多
文摘Water quality target management in watershed is the fundamental choice of city rivers suffering both serious pollution and severe water shortage. In this study, we performed a case study regarding river pollution control plan based on water quality target management in the North Canal River catchment of Beijing section, in order to obtain effective water quality improvement programs. The ammonia nitrogen (NH3-N) and chemical oxygen demand (COD) were taken as the main controlling pollutants. Water quality targets and basic water quality improvement scenarios were set up considering different intensities of population regulation scenarios and gradually strengthening emission control measures. The MIKE11 model was adopted to simulate the effects of a range of water quality improvement scenarios. Results indicated that the basic scenarios could dramatically improve the surface water environment. However, additional intensive and combined measure programs should be implemented to ensure that the water quality would basically meet the targets of corresponding water function zones. The results highlight the need to implement water conservation in water shortage urban river basin and show the importance of enhancing drainage communication and conducting ecological water replenishment in such kind basins. It is expected to provide a reference for the water environment management practice of other metropolis in the world facing both crisis of water resource shortage and water environment pollution.
文摘子宫颈癌在欧洲已不常见,但仍是一个主要的公共卫生问题。手术是子宫颈癌的主要治疗手段之一,其质量控制有助于降低术后并发症的发生率和治疗成本,为多学科综合管理的重要组成部分,因此,实施质量管理计划可提高子宫颈癌患者的生存率。2020年1月8日《国际妇癌杂志》(International Journal of Gynecological Cancer)发表了《欧洲妇科肿瘤学会子宫颈癌手术治疗质量指标》,了解欧洲子宫颈癌手术质控内容和流程,对于我国子宫颈癌的治疗工作有参考价值,现对其进行简要解读。
