"This site is potenially at risk of flooding during heavy rainfall events. The extent of this flooding is shown on the attached special land feature map as "Overland flowpath".
然后看后面attached map, 有一个4000m2 to 3ha的overland flow path从propety中间穿过. 请问这样的房子会有什么问题? 这个4000m2 to 3ha是代表什么意思?