[2] Basai wetland lies in one of the paleochannel of the Sahibi River, a tributary of Yamuna which originates from the Aravalli range in Rajasthan and flows through west and South Haryana into Delhi where it is also known as the Najafgarh drain.

Basai wetland is one of the several wetlands that lie in series along the paleochannel and the current course of the Sahibi river, including the Masani barrage wetland, Matanhail forest, Chhuchhakwas-Godhari, Khaparwas Wildlife Sanctuary, Bhindawas Wildlife Sanctuary, Outfall Drain Number 6 (canalised portion in Haryana of Sahibii river), Outfall Drain Number 8 (canalised portion in Haryana of Dohan river which is a tributary of Sahibi river), Sarbashirpur, Sultanpur National Park, Basai wetland, Najafgarh lake and Najafgarh drain bird sanctuary, Ghata lake, Badshahpur lake, Khandsa lake and The Lost lake of Gurugram.

It includes areas with open water, Water Hyacinth Eichhornia crassipes, Typha reedbeds, fields of Paspalum grass, and adjoining fallow fields, seasonally cultivated lands, and some thorn scrub vegetation with Salicornia and Acacia.

[2] Crops such as rice, wheat, pearl-millet, sorghum, and mustard are cultivated seasonally in the agricultural land.

[2][3] The bird life of Basai Wetland includes the following species of conservation concern[2][6] as per the IUCN Red List of Threatened Species:[8] Among the mammals, Nilgai, Golden jackal, Jungle cat, and Indian grey mongoose are known to occur.

Over two decades, around six-sevenths of the village's agricultural land has been lost due to urbanization and residential development.

[5] Environmentalists have raised concerns over increasing construction activities, real estate development, and disturbance affecting the wetland and birds.

[10] A proposed construction and demolition (C&D) plant by a multinational construction firm, approved by the Gurgaon Municipal Corporation, has raised fresh concerns over habitat loss, dust pollution, and disturbance to the wetland and its rich bird life.