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Texas

Lower Colorado-San Bernard Coastal

Left: the Lower Colorado-San Bernard Coastal basin (WBD HUC4 1209) with its NHDPlus HR network, its larger lakes, reservoirs and East Matagorda Bay as water, and our South Concho model (USGS 08131400) in orange, enlarged in a box. Right: that model drawn large, every one of its channels, with its water bodies in blue.
Left: the Lower Colorado-San Bernard Coastal basin, with our South Concho model (USGS 08131400) in orange, enlarged in the box, and its larger lakes, reservoirs and East Matagorda Bay in blue. Right: that model drawn large, its channels in orange and its water bodies in blue.
  • 1 published SWAT+ model
  • NHDPlus HR: 90,101 km of network flow paths in its Texas HUC8s, 2.61x NHDPlus V2.1's 34,543 km, over catchment areas that differ by 8.3 % between the two datasets
  • 56 USGS gauges with a 90 % daily record, 2014-2024, in its Texas HUC8s (17 of 20 HUC8s covered)
  • 20 HUC8s mostly in Texas, 73,152.1 km² in all (WBD HUC12 sum)

Basin: HUC4 1209 (Lower Colorado-San Bernard Coastal) of the USGS Watershed Boundary Dataset.

Our models in this basin

South Concho · USGS 08131400 (Pecan Creek near San Angelo)

NHDPlus HR, not Version 2, in this basin

020,00040,00060,00080,000100,000020,00040,00060,00080,000100,000NHDPlus Version 2.1, kmNHDPlus HR, kmLower CanadianNorth CanadianRed HeadwatersRed-Washita River BasinRed-SulphurSabineNeches River BasinTrinity River BasinGalveston Bay-San JacintoBrazos HeadwatersMiddle BrazosLower BrazosUpper ColoradoCentral Texas CoastalNueces-Southwestern Texas CoastalRio Grande-AmistadRio Grande Closed BasinsLower PecosRio Grande-FalconLower Colorado-San Bernard CoastalLower Colorado-San Bernard Coastal
Each point is one basin (WBD HUC4), over its HUC8s that lie mostly in Texas: its network flow paths in NHDPlus Version 2.1 (across) and in NHDPlus HR (up), filled with canals and ditches in both counts, hollow without them. On the line, the two would be equal. Ringed: the two datasets' areas for this basin differ by more than 5 %: Galveston Bay-San Jacinto, Brazos Headwaters, Lower Brazos, Upper Colorado, Lower Colorado-San Bernard Coastal, Central Texas Coastal, Rio Grande Closed Basins, Lower Pecos and Rio Grande-Falcon. In this figure, this basin's points are orange.

A model of your Texas watershed

We build a SWAT+ model for a USGS stream gauge in Texas, from national data. You download it as files you open in SWAT+ Editor and run, and you keep the files.

Free, $0, to try it on a real station. Starter, $50 / month USD. MAX, $100 / month USD. Cloud calibration is pay as you go, on every plan including Free.

See the plans and order

Texas: all our models and work · Central Texas Coastal · Neches River Basin · Nueces-Southwestern Texas Coastal · Red-Washita River Basin · Trinity River Basin