The Nakdong river basin, which supplies drinking water to the Busan Metropolitan City, the second largest city in the Republic of Korea, became heavily polluted from the growth of an upstream textile industry. Research revealed that downstream water treatment costs exceded upstream water protection costs, prompting authorities to focus on protecting and treating wastewater at source.
The Songhua River Basin is the third largest river basin in the People’s Republic of China. Almost the entire northeast of the country lies within this basin. The Songhua is also one of the China’s four most polluted rivers, suffering until recently from untreated urban wastewater, industrial wastewater and agricultural non-point sources.
The Onon River, which flows through Mongolian territory into the Amur through the Shilka River, is an important catchment area forming the headwaters of the Amur/Heilong River - the longest undammed river in the Eastern Hemisphere.
Laguna Lake, the fourth-largest lake in Southeast Asia, lies in the provinces of Rizal and Laguna. Increased development within the basin has caused water quality to decline steeply.
The Bengawan Solo basin is the largest on the island of Java. Administratively it is shared by two provinces, Central and East Java, and is jointly managed by Jasa Tirta Public Corporation I (PJT I) and Balai Besar Wilayah Sungai Bengawan Solo (BBWS-BS).
The Brantas basin in East Java supplies water to about 16 million users, but suffers from poor water quality due to rapid population growth and industrialization.
The Yoshino River flows through Shikoku Island in southeastern Japan. The Yoshino River Basin Management Plan of 1966 was one of the first such efforts in Asia and the Pacific region. It was formulated through consultations held with local stakeholders, including riparian residents in Tokushima on the east of Shikoku Island, upstream residents of Kochi on its southern coast, and transboundary water users in Ehime and Kagawa on its northern side.
Plans to build a dam on the Yom River of Thailand have caused disputes between water users and communities living in the basin. In 2008, the Ministry of Natural Resources and Environment of Thailand, with support from the Asian Development Bank, launched a collaborative integrated water resources management initiative that focused on participatory processes for the management of the Yom River Basin.
The 4Ps River basin consists of four sub-basins of the Mekong River — the Prek Preah, Prek Krieng, Prek Kampi and Prek Te. Located in eastern Cambodia, the basin is still mostly covered by forests. About 1% of the area is cultivated, and a quarter of this is irrigated. Poverty is still widespread and local people are vulnerable to floods and drought.
The Yarra basin lies in a drought-prone region of the southern state of Victoria. The state capital Melbourne is positioned at the estuary of the Yarra River, from which it obtains 70% of its water needs.