Arakawa River flows nearly in the center of Saitama Prefecture from a mountainous region down through plains. This river is considered to be an ecological axis (an great artery of ecological networks) that links together diverse natural environment of the Prefecture.
A local environment NGO, Ecosystem Conservation Society-Saitama, has been suggesting the impo-rtance of creating ecological networks of Saitama Prefecture along Arakawa River as their axis and has beentaking an active part in various cnservation efforts in the basin of the River.
On the other hand, at the Ministry of Construction has also been engaged in conservation and creation of natural environments of the Basin in a positive manner, to meet the demands of the times, that considerations to the natural environments are highly indispensable, as well as cont-rol and utilization of water.
The biotope projects in the Arakawa River basin were launched in respons to both the NGO's efforts and the Ministry of Construction's policy.
Furthermore, some examples of biotope projects, on the axis of the national level ones, condu-cted by cities and towns in the Basin are now present.
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