The plain of Las Bela, or the Porali trough, is a triangular lowland embankment. Only in this plain true mounds are found. Sites located on the gravel plains have very shallow cultural deposits. Despite the rather fertile environment, the number of sites was surprisingly low.

The most important prehistoric settlements are Adam Buthi, Niai Buthi, and Balakot. Balakot which is located 80km south of Bela on the Khurkera plain, is the only prehistoric settlement south of Bela. Adam Buthi, Muridani and sites dated to the Historic period and the so-called Edith Shahr A and B Complexes are situated north of Bela, closer to the mountains bordering the plain towards Jhalawan, while Niai Buthi lies more towards west. These zones are environmentally very different (16).

Apart from one Islamic site, Kaiara Kot, which was first noted by A. Stein, and sites dating back to the British Period, the southern central and eastern portions of Las Bela are devoid of archaeological sites. This part is flooded during rains and, south of Sirinda Lake, through tidal waters, turning the whole area into a large, inaccessible mud plain (17).

These conditions seem to make the presence of sites unlikely, but, considering the fact, the the plain level on the Khurkera plain has risen since 3000 BC by about 8m, lower sites might well be buried under sediments in the central portion. The sedimentation rate appears to be much lower there, but the palaeo-drainage pattern of the perennial Porali and its tributaries and overflow channels has not yet been studied.