Editing East Java (section)

=== Water ===
[[File:Frost at Ranu Pani on 4 August 2018 by Susanto Tan.jpg|thumb|[[Classifications of snow|Light snow]] and [[frost]] are common at East Java highlands over 2,000 [[Metres above sea level|meters above sea level]] in middle of year during late night until morning]]

Two of the most important rivers in East Java are the [[Brantas River]] (290&nbsp;kilometres), and the [[Solo River]] (548&nbsp;kilometers). The Brantas River has headwaters on the slopes Mount Arjuno near Batu, and flows through most areas in East Java, like Malang, Blitar, Tulungagung, Kediri, Jombang and Mojokerto. In Mojokerto, the Brantas River split into two: [[Kali Mas]], and Porong; both empty into the Madura Strait. The Solo River has headwaters on the slopes of Mount Lawu which lies on the border between East Java and Central Java, and flows through a portion of the eastern part of Central Java and East Java, which eventually empties into the sea at Gresik. The Brantas River and Bengawan Solo are managed by Perum Jasa Tirta I. On the slopes of Mount Lawu near the border with Central Java are Sarangan, a natural lake. The main dam in East Java, among others Ir. Sutami and Selorejo Dam, which is used for irrigation, fish farming and tourism.