現在位置の階層

  1. トップページ
  2. 治水課
  3. 治水事業 トップページ
  4. Proposal for Conservation of the River Environment in Kushiro Mire Index
  5. Ⅲ Measures to meet the targets
  6. 4 Controlling the mire vegetation

4 Controlling the mire vegetation

Proposal for Conservationof the River Environment in Kushiro Mire

Ⅲ Measures to meet the targets

4 Controlling the mire vegetation

 To counter the rapid increase in the distribution of black alder and the decrease in reed and sedge colonies, which are indicators of a river environment, measures should be taken to control the vegetation of the mire.
[Specific measures]
 Control the vegetation by changing groundwater levels and the frequency of inundation, and by obstructing flow of sediment and nutrient salts. Specific measures are as follows:
Illustration of the measures (Setsuri Sluice area)
Illustration of the measures (Setsuri Sluice area)
Setsuri Sluice area:
Raise the groundwater level by inundation, and clarify its influence on mire vegetation. Complete the experiment, with the target date of fiscal year 2002, then evaluate it.
Illustration of the measures (Setsuri River area)
Illustration of the measures (Setsuri River area)
Setsuri River area:
Based on the experiment in the Kayanuma area, restore the Hororo River to its original shape and prevent sediment overflow where the Hororo and Setsuri rivers share a reach, so as to control the character of the mire vegetation.
Illustration of the measures(Kuchoro River area)
Illustration of the measures(Kuchoro River area)
Kuchoro River area:
Control the mire vegetation by using the mire as a settling basin where the Kuchoro River enters the mire. Start working on this area immediately.

現在位置の階層

  1. トップページ
  2. 治水課
  3. 治水事業 トップページ
  4. Proposal for Conservation of the River Environment in Kushiro Mire Index
  5. Ⅲ Measures to meet the targets
  6. 4 Controlling the mire vegetation