Unsan County of North Phyongan Province is a mountainous area with many rivers.
It has over 20 five-kilometre-long rivers, including Kuryong, Joyang, Uhyon and Ryonghung rivers.
In the past it frequently suffered from floods due to the influence of abnormal weather caused by continuous global warming in recent years.
Irregular floods in the rainy seasons turned the rivers in the county into the source of calamities.
In July eight years ago, river banks broke down due to over 470mm of heavy rainfall.
Dwelling houses and public buildings were inundated and collapsed, bridges and roads destroyed and many farmland was waterlogged.
Should we adapt ourselves to the natural disasters or should we protect our home villages by harnessing nature?
In this context, all the officials and people in the county turned out as one in the work to clear away the aftereffects of disasters and build rock-firm banks on all rivers with a determination to turn their villages into cradles of happiness.
It was quite a gigantic project which required to build over 30 kilometres of embankments, dredge over 6 million square metres of riverbeds and reinforce over 100 thousand square metres of banks with stones.
From the outset, the project was not simply designed to restore the original state.
They gained many benefits by building embankments on the rivers and paving roads over 10 metres wide.
They built bridges and conducted the technical improvement of roads so as to ensure the safety of operation of vehicles and the convenience of traffic service.
They increased grain production by bringing many new land under the plough and built many dwelling houses and schools, and thus they made a big stride in promoting the regional development. As a result, floods have wreaked no havoc on this area.
In August last year, a heavy rain of 1 350mm lashed the county.
It was nearly three times greater than the precipitation they had seven years ago, but it had no influence on the county population thanks to the solidly-built embankments.
Today, they are turning out as one in land administration project for harnessing nature.
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