Ha Tay: Land collapsed the chain

Suddenly the whole area of ​​collapse. Houses, gardens, trees also fall under. This is a recent phenomenon in Phu Lien village, Hop Tien commune in My Duc district (Ha Tay).

Oddly, after every rain, hundreds of hectares of village land subsided to about 3 - 4cm . If before, when heavy rains were causing flooding, now, no matter how heavy the rain, the whole water will no longer form a flow but be 'sucked' socks into the ground, just like when people water. rain water on dry sand.

According to Mr. Nguyen Hung Nguyen, the land collapse phenomenon began to occur from the beginning of May 2006. The first land subsidence was in his garden when the family invited workers to drill wells. When the drill just reached the groundwater at a depth of 30m, the surrounding land suddenly dropped to nearly 1m with a diameter of 50m wide, forming a big hole.

The house collapsed due to land subsidence
(Photo: Laodong)

Fallen land has pulled down the kitchen space and cracked all 4 houses. Worse, the area around the collapsed pit also appears to have long cracks. By this time, many cracks have been eaten asphalt. The collapse of Mr. Nguyen's house also caused 4 households living nearby to crack their houses, constructions and walls.

According to Mr. Nguyen, in fact, people in Phu Lien village only know that their village land is falling when more and more houses are cracked and cracked.

Because land subsidence is still happening in both width and depth, people are very worried about their lives if their houses suddenly fall down. By this time, Mr. Nguyen's house is about to collapse. However, due to the fact that the government has not been able to allocate land for resettling, his family and other households still have to stay in their houses.

According to Mr. Dang Ngoc Chuan, Chairman of Hop Tien Commune People's Committee, the cause is still unknown. But one of the bases to assume that the cause of land subsidence and subsidence is due to the fact that families have been racing to drill wells to get groundwater for many years. According to statistics, this village has nearly 200 wells.

Mr. Nguyen Van Ly, Head of the Department of Natural Resources and Environment of My Duc district, said the experts of Ha Tay Department of Natural Resources and Environment, the Department of Water Resources Management and the Department of Geological Minerals of Vietnam have returned to Phu Lien to check and make 3 assumptions.

One, because in the process of drilling wells, there is a gas reservoir in the ground. The escaped gas has lost the volume in the ground, causing subsidence and collapse. Two, when drilling wells, drill bits encounter limestone cracks in the area (materials spill into the limestone cracks) causing subsidence and slump. Thirdly, inflation in groundwater drilling makes land subsidence.

It is known that recently, in the area of ​​My Duc district (Ha Tay), there has been subsidence in Vai (Hop Thanh commune) and Phu Luu Te commune. According to Dr. Pham Van Quang - Deputy Director of the Institute of Geology and Environment (Vietnam General Association of Geological and Mineral Resources) - this phenomenon is similar to the Karst collapse in Cam Tuyen (Quang Tri) in February 2006.

However, all is just a assumption. Ha Tay People's Committee said that the provincial government has now assigned Geophysical Technology Company to conduct a geological survey to formally conclude and propose a plan to relocate people if the area is determined to be dangerous. .