Water Environment of the Tokyo City

Abstract

 It is important to understand the history of water development and the water environment to solve problems related to water and plan its effective future use. First, surface water and groundwater from shallow areas where groundwater flow was controlled by geomorphology provided sources of water in Tokyo. Following the Edo period, the development of water resources accelerated, and groundwater controlled by geology was used by industries. The expansion of water use in Tokyo led to major problems such as land subsidence in the 1970s. Many studies have been undertaken on water use, which extend to the fields of pollution, land subsidence, and flow systems, etc. Development and management of the total groundwater environment in the near future requires an understanding of issues including water level, water quality, and water temperature.