Canals do not have fresh water from upstream of the dry season, so the overwhelming tide in salt in the soil, seizes, builds on a lot and the same distance to the mouth of the River, never the salinity in larger canals in the river. Meanwhile, due to increased population, socio-economic development, the boom in local farming activities make the exploitation of groundwater overuse has depleted groundwater sources do.
đang được dịch, vui lòng đợi..