Various hydrological and flood studies have been undertaken for the Department of Water Affairs and the City of Windhoek since 1969, including hydrological studies and yield analyses for the proposed Dürnsternbrook Dam in the Otjiseva River, the Swakoppoort Dam in the Swakop River, the proposed Omusema Dam in the Omatako Omuramba and the Neineis Dam in the Omaruru River. Several flood studies have been conducted for a variety of clients in the Klein Windhoek, Gammams and Arebbusch Rivers which flow through Windhoek. Other projects include investigations into the 2004 flooding of the Arebbusch River and a storm water channel, which may have contributed to the flooding of the Acacia Development in Windhoek, as well as an investigation into the storm water provision around the new Sam Nujoma Stadium, which may have contributed to the January 2006 flooding of portions of the Dolam Township in Windhoek. More recently, several flood line assessments have been performed for developments along the Klein Windhoek and Arebbusch Rivers as well as for a proposed development adjacent to the Okahandja River.