Summary of jotsuura dam
jotsuura dam is multipurpose dam supplying of maintenance (securing of agriculture water, maintenance of river environment), water supply water of normal function of flood control, running water.
We started the dam body construction from 1999 and were completed in 2004.
(1) Flood control
In plan rise of a river flow rate 26 (㎥/s) of dam point, we perform 20 (㎥/s) flood control and perform reduction, prevention of flood damage of Ariakemachikoutsuura, Amakusa-shi district.
(2) Maintenance of normal function of running water
We stably supply water from dam to the downstream river to maintain supply and river environment of agriculture water of dam jitenshitaryuenkawa.
(3) Water supply water
As water supply water of Ariakemachikoutsuura, Amakusa-shi district and adjacent district, we supply up to 800 (㎥/ day).
Specifications of dam
|Specifications of dam||Water system name||Upper Tsu Urakawa||Reservoir specifications||Catchment area (㎢)||1.17 (directly: 0.56 indirectly: 0.61)|
|River name||Upper Tsu Urakawa||Flooding area (㎢)||0.025|
|Position||Ariakecho, Amakusa-shi||Total storing water capacity (㎥)||467,000|
|Model||Gravity-type concrete dam||Valid storing water capacity (㎥)||440,000|
|The amount of bank (m)||54.0||Flood control capacity (㎥)||230,000|
|Mayor of bank top (m)||205.0||Irrigation capacity (㎥)||210,000|
(maintenance 160,000 of normal function of running water)
(water supply 50,000)
|Bank volume (㎥)||141,000||taisayoryo (㎥)||27,000|
(2) Storing water capacity distribution figure
Structure of dam
(1) Ground plan
(2) Front elevation (the upper classes side)
(3) Cross section
■Amakusa airline in the case of the use
It is about 40 minutes by rent-a-car and taxi from Amakusa Airport
■Car in the case of the use
It is about 1 hour 40 minutes from the Kumamoto city
From Matsubase I.C About one hour ten minutes
It is about 30 minutes from Amakusa-shi government office