[problem] when a large-scale floods and heavy snowfall in the land has been predicted, to provide a container for use in the precipitation system for preventing accidents on land by absorbing a huge amount of moisture in the cloud and thus to drop the water such as rain, snow or hail on the sea. A is filled with material which generates heat by absorbing the fine particles and the moisture of the water-absorbing polymer in the container, it is sprayed in large quantities. When the water-absorbing polymer C that has absorbed moisture from the ice crystals A and cloud particles B has a large swell it can no longer be floating in the clouds with a huge amount of precipitation to fall on the sea.BACKGROUND 1【課題】陸上での大規模な洪水や豪雪が予測されたとき、雲の中の莫大な量の水分を吸収して雨や雪や雹などの水を海上に落下させてしまうことで陸上での災害を防ぐ降水システムに用いる容器を提供する。【解決手段】吸水ポリマーの微粒子と水分を吸収して発熱する物質を容器に詰め、大量に散布する。氷晶Aや雲粒Bからの水分を吸収した吸水ポリマーCが大きく膨潤すると雲の中に浮遊できなくなって莫大な量の降水となって海上に落下する。【選択図】図1
