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
Invasion of the Sea 1800s. He discovered that large areas of the Sahara Desert were below sea level and proposed that a canal be dug from the Mediterranean Sea to these Saharan basins, which would allow for the creation of an inland "Sahara Sea". Others had made similar proposals at the same time, and canal building generally was a popular geopolitical endeavor of the first decade of the 1900s, when "Invasion of the Sea" was written. Some have noted that the inclusion of the Berber raiders (who are opposed to the efforts of the European engineers and military officers) is a foreshadowing of the