CONCRETE will creep across the New Territories as Hong Kong becomes an increasingly urbanised service centre for the Pearl River Delta, according to proposals published yesterday. The official projections for the next 20 years anticipate Hong Kong being built up to cater for Guangdong with domestic developments led by the new airport and port projects. Rapid construction and urbanisation will focus in northwest New Territories, where the new town of Tin Shui Wai is to be turned into a business hub. But the eastern and southern parts of Hong Kong will become a green belt with zoning policies to preserve the rural landscape, according to the Territorial Development Strategy Review. The strategy, to be released today for a three-month public consultation, is the second territorial environmental and land use review by the Government. It provides policy guidelines for planning until 2011 and updates development projects outlined in the last review in 1984. The focus of industrial development will be on the east bank of the Pearl River, the review predicts. And a strip of development areas will be formed along Guangzhou, Shenzhen, and western Hong Kong, supported by the Chek Lap Kok airport and the related new town developments. The west bank of the Pearl River will mainly see port developments in Macau and Zhuhai. Assuming a ''steady'', ''high'', or ''extra high'' growth rate in the delta area, the Government has planned three development scenarios. The first scenario will see development focus on the new airport area - Lantau's Tai Ho and Tung Chung new towns. Tin Shui Wai will also turn into a growth pole for the northwestern New Territories. The second scenario assumes a high growth rate and will include, as well as plans in the first scenario, developments in Kowloon Bay, Rambler Channel, and Green Island. And developments under the extra high growth scenario will extend to Hong Kong South, suburban Sham Tseng, and Kam Tin and Lok Ma Chau in the northern New Territories. The department is expected to finalise a development plan by next April.