Table 1. Sampling sites and their GPS coordinates

Sampling sites	Main features of sites		Coordinate points	Elevation (m)
	Post-rainy season	Dry season
Sefani	High volume, turbid	Low volume, clear	11° 27’ 46” N	1,553
	Color, rocky, large	Color, rocky, sandy	37° 38’ 1” E
	Trees	Leafless large trees
Ketero	High volume, turbid	Low volume, turbid	10° 39’ 49” N	1,136
	Color, shrubs, infested	Color, local	38° 30’ 11” E
	By local crocodiles	Irrigation, shrubs
	Muddy
Millennium	High volume, turbid	Low volume,	10° 4’ 29” N	1,098
Bridge	Color, sandy gravel	Sandy, little	38° 11’ 24” E
	Shrubs	Vegetation
Bure-Abbay	High volume, turbid	High volume	10° 17’ 31” N	791
	Color, shrubs,	Turbid color, dense	37° 0’ 44” E
	Crocodiles,	Shrubs
	Muddy