A Stable Isotopic Raito Method-Based Study on Contamination of the Water in Arakawa River by Nitrogen Pollution and Purification

“创建21世纪世纪水文循环系统和保护荒川的水环境”[1]在荒川创建可行的“水文循环系统”的研究为了保护荒川源头的水文循环和水源林，（1）必须培育水源林。(2)lt要加强水源林的营造、养护和管理。(3)In鉴于创建“水文循环系统“（包括“绿色大坝”工程）的重要性，对荒川上游的自然环境保护进行了审查。[2]关于东京市城市水源的创造和保护的研究（1）东京都厅以多摩河上游的[水日]为重点，对多摩河上的城市水源林进行管理。 ...更多信息 这条河水质很好。（2）为了保护荒川河和音川的城市供水水源，有必要采取适当的河水净化措施。[3]荒川河上游山间地区污水处理系统建设的探讨（1）由于在荒川河上游地区广泛使用组合式污水处理池，以及荒川河沿岸的山间地区，这些地区的水质（以生化需氧量计）可以降至目前水平的八分之一以下（2）鉴于污水/工业废物处理厂集中在中游的事实，Aiakawa河，制定适用于河流的排放标准，并由国家政府就这一标准提供行政指导。[4]采纳社区居民建议的“水环境保护制度“当社区居民或民间环保团体公布河流环境调查结果时，有必要认真考虑，并建立一个在行政层面上明确反映的相关制度。少

"Creation of a Hydrological Cycle System of the 21 st Century and Preservation of the Aqueous Environmet" in the Arekawa River [1] Examination for the Creation of a Viable "Hydrologica] Cycle System" in the Arakawa River For the preservation of the hydrological cycle and the the water source forests on the headwaters of the Arakawa River, (1)It is necessary to cultivate water source forests. (2)lt is necessary to step up efforts to create, maintain and manage water source forests. (3)In light of the importance of creation of a "hydrological cycle system "(including "Green Dam" Project), an examination for the preservation of the natural environmentn in the upper reaches of tha Arakawa River was made. [2] Examination for the Creaton and Preservation of Sourcer of City Water in the City of Tokyo (1)The Tokyo Metropolitan Govemment Office manages city water source forests on the Tama River with emphasis on [mizuhi] in the upper reaches of the river It has been verified that the water of t … More he river is of good quality. (2)For the preservation of the headwater for city water supply of the Arakawa River and Tone River ,it is necessary to take appropriate river water purification measures, [3] Examination for the Creation of a Sewage Treatment System in the Upper Reaches of, the Intermontane Aiaes on, the Arakawa River (1)It has been found that as a result of widespread use of combined sptic tanks in the uppei reaches of, and the intermontane areas on, the Arakawa River, the quality of water in terms of BOD in these areas can be reduced to less than one-eight of the Current level (2)In viewnof the fact that sewage/industrial waste theatment plants are concentrated in the middle reaches of the Aiakawa River, establishment of an emission standard applicable to the river and administrative guidance on such a standard by the national government aie essential.[4] Adoption of an"Aqueous Environment Protection Sysytem"Proposed by Residents of the Local Community When residents of the local community or a private environmental protection groups makes public the results of a survey of the fluvial environment, it is necessarly to give serious consideration to them and create a relevant system which clearly reflects them at theadmmistrative level. Less