Land dredging is also another method of land reclamation. Extensive land reclamation and irrigation projects have made increased cultivation possible. Minghua is now completely landlocked due to extensive local land reclamation and redevelopment efforts. The scarcity of land suitable for construction led to land reclamation. Tianjin Port is by necessity largely man-made through dredging and reclamation. Lake Balboa is a lake filled with water reclaimed from the Tillman Water Reclamation Plant. The city has expanded beyond the original peninsula through land reclamation and municipal annexation. The wild plant is used for stabilising soil in land reclamation and specialised landscaping schemes. Waste is disposed mostly in areas requiring reclamation. Agriculture was a drive for land reclamation before industrialisation. Instead they concentrated on their flood protections and land reclamation projects. The land is formed by the Yangtze's natural deposition and modern land reclamation projects. The Zuiderzee Works (Zuiderzeewerken) are a system of dams, land reclamation, and water drainage works. This was done through Singapore's land reclamation efforts. Artificial islands are an example of land reclamation.