Delta Works needed level of flood protection and the resulting costs are a recurring subject of debate, and involve a complicated decision-making process. In 1995 it was agreed in the Delta Plan Large Rivers and Room for the River projects that about 500 kilometres of insufficient dyke revetments were reinforced and replaced along the Oosterschelde and Westerschelde between 1995 and 2015. After 2015, under the High Water Protection Program, additional upgrades are made. In September 2008, the Delta Commission presided by politician Cees Veerman advised in a report that the Netherlands would need a massive new building program to strengthen the country's
Indus River Delta-Arabian Sea mangroves spills are another hazard. Most of the Indus Delta mangroves have been cleared for firewood and to create grazing land but some remains in three protected areas: Marho Kotri, Cut Munarki Chach Wildlife Sanctuaries and Mirpur Sakro Game Reserve. The World Wildlife Fund assesses the status of the mangrove habitat as being critical or endangered. In projects started in 1985, the Sindh Forest Department has been in the forefront of replanting and restoring mangrove areas in the delta, with support from the International Union for Conservation of Nature, the United Nations Environmental Programme, UNESCO and the World Bank. About of