Bangkok has several parks, although these amount to a per capita total park area of only  in the city proper. Total green space for the entire city is moderate, at  per person. In the more densely built-up areas of the city these numbers are as low as  per person. More recent numbers claim that there is  of green space per person, compared to an average of  in other cities across Asia. In Europe, London has 33.4 m2 of green space per head. Bangkokians thus have 10 times less green space than is standard in the region's urban areas. Green belt areas include about  of rice paddies and orchards on the eastern and western edges of the city, although their primary purpose is to serve as flood detention basins rather than to limit urban expansion. Bang Kachao, a  conservation area on an oxbow of the Chao Phraya, lies just across the southern riverbank districts, in Samut Prakan Province. A master development plan has been proposed to increase total park area to  per person.