The Seti Khola (=river) runs along one of the steepest topographic gradients in the Central Himalayas and is the main drainage system of the Pokhara Valley, home to the eponymous city with an estimated population of half a million. In the Pokhara Valley, the Seti Khola runs through a distinct landscape dominated by broad, unpaired, alluvial terraces which abruptly alternate with short (<1 km) reaches, where the river flows through narrow (<10 m) and deep (up to 90 m) gorges. In order to facilitate hydrodynamic modelling of one-dimensional, steady flow in HEC-RAS 5.0.7, we surveyed the Seti Khola's channel and overbank topography as well as surface roughness along a 30-km long reach. During two field-visits (October 2016 and October 2019), we surveyed a total of 95 river cross sections utilising a TruPulse 360 laser range finder and a Garmin eTrex handheld GPS. Additionally, during our October 2019 field-season, we also estimated surface roughness or Manning's n of the Seti Khola's channel and left and right overbank at 61 locations –using the determination methodology described by Arcement Jr and Schneider (1984; doi:10.3133/wsp2339) and Chow (1959).

File descriptions: Crosssection_points_2016.zip: Shapefile Feature Class of the point geometry. Each point feature represents a survey point along the river cross sections measured during the 2016 field season. Each point contains information about its X, Y, and z coordinates, projected in WGS 1984 UTM Zone 44N (attribute fields x-UTM , y_UTM, z_UTM) and its cooresponding latitude and longitude in decimal degrees (attribute fields Latitude and Longitude). UTM coordinates where surveyed using a TruPulse 360 laser range finder and a Garmin eTrex handheld GPS.Crosssection_points_2019.zip: Shapefile Feature Class of the point geometry. Each point feature represents a survey point along the river cross sections measured during the October 2019 field season. Each point contains information about its X, Y, and z coordinates, projected in WGS 1984 UTM Zone 44N (attribute fields x-UTM , y_UTM, z_UTM) and its cooresponding latitude and longitude in decimal degrees (attribute fields Latitude and Longitude). UTM coordinates where surveyed using a TruPulse 360 laser range finder and a Garmin eTrex handheld GPS.Mannings_n.zip: Shapefile Feature Class of the point geometry. Each point feature represents a point where Manning's n was estimated during our October 2019 field season, using the methodology described by Arcement Jr and Schneider (1984) and Chow (1959). Each point contains information about its X, Y, and z coordinates, projected in WGS 1984 UTM Zone 44N (attribute fields x-UTM , y_UTM, z_UTM) and its cooresponding latitude and longitude in decimal degrees (attribute fields Latitude and Longitude). Attribute field n_channel descibes the Manning's n estimate for the channel and attribute field n_floodpla the Manning's n estimate for the adjacent floodplains.