Climate driven hydrological transport model
HydroTrend is an ANSI-standard C numerical model that creates synthetic river discharge and sediment load time series as a function of climate trends and basin morphology and has been used to study the sediment flux to a basin for basin filling models. As a drainage basin simulator, the model provides time series of daily discharge hydraulics at a river mouth, including the sediment load properties. HydroTrend was designed to provide input to lake or shelf circulation and sedimentation models  , and study the impact of land-sea fluxes given climatic change scenarios  . HydroTrend simulates the major processes that occur in a river basin, including:
- Glacierized areas with advances and retreats depending on the climate scenario,
- Snow accumulation in the winter and melt in the subsequent spring/summer,
- Rainfall over the remaining portions of the basin with canopy evaporation,
- Groundwater recharging and discharging,
- The impact of lakes and reservoirs on the stream flow as well as on the sediment load due to sediment retention.
The Hydrotrend model typically runs at daily timesteps, for a user-defined number of years.
This will be something that the CSDMS facility will add
This will be something that the CSDMS facility will add
|Q||= Qr + Qn + Qice - QEv ± Qg||= Water discharge at the river mouth [m3/s]||(1)|
|Qs||= ω B Q0.31 A0.5 R T||for T ≥ 2 °C||= Long-term suspended sediment load at the river mouth [kg/s] ||(2a) or|
|Qs||= 2ω B Q0.31 A0.5 R T||for T < 2 °C||= Long-term suspended sediment load at the river mouth [kg/s] ||(2b)|
|B||= L (1 - TE) Eh||= Expression that capture the importance of geology and human factors. ||(3)|
|(Qs[i] / Qs)||= ψ[i] (Q[i] / Q)Ca||= Daily suspended sediment load at the river mouth [kg/s] ||(4)|
|Qb[i]||= (ρs / ρs - ρ) * (ρ g Q[i]β S eb) / (g tan λ)||when u ≥ ucr||= Daily bedload at the river mouth [kg/s] ||(5)|
|Q||Long-term water discharge||m3/s|
|Qr||Water discharge generated by rainfall||m3/s|
|Qn||Water discharge generated by nival melt||m3/s|
|Qice||Water discharge generated by glacier melt||m3/s|
|QEv||Water discharge loss by evapo-transpiration processes||m3/s|
|Qg||Water discharge loss or generated by ground water||m3/s|
|Qs||Long-term suspended sediment load (30yrs or longer)||kg/s|
|A||Drainage basin area||km2|
|R||Drainage basin relief||km|
|T||Drainage basin temporal and spatial mean temperature||°C|
|TE||Trapping efficiency of reservoirs / lakes||-|
|Qs[i]||Daily suspended sediment load||kg/s|
|Ψ[i]||Daily random variable with a log-normal distribution||-|
|Q[i]||Daily water discharge||m3/s|
|Ca||Annual rating term coefficient with a normal distrbution||-|
|g||Acceleration due to gravity||m/s2|
|β||Bedload rating term||-|
|S||Slope of the riverbed||m/m|
|λ||Limiting angle of response of sediment grains lying on the river bed||-|
|ucr||Critical stream velocity||m/s|
Note 1: Hydrotrend Run Time in WMT is user-defined. All relevant other components in WMT run at daily timestep, thus HydroTrend runs for a number of years but it is listed in days. Example: I want to run HydroTrend for 100 years, I specify the simulation duration to be 36,500. In WMT you can not adjust for leap year (in the stand-alone ANSII C-code for HydroTrend you can run with 'real climate' input values).
Note though that the simulation run time specified by the user is now rounded up to the nearest year or, if it's already an exact multiple of a year, is kept at that year. So,
366 days -> 2 year 365 days -> 1 year
Note 2: If you want to upload your own hypsometry file, you will need to follow instructions on the file format precisely. More information can be found here: [Hypsometry file format nder metadata for this model] Numerical scheme
An example run with input parameters, BLD files, as well as a figure / movie of the output
Follow the next steps to include images / movies of simulations:
- Upload file: https://csdms.colorado.edu/wiki/Special:Upload
- Create link to the file on your page: [[Image:<file name>]].
See also: Help:Images or Help:Movies
Key HydroTrend Papers
- Kettner, A.J., and Syvitski, J.P.M., 2008. HydroTrend version 3.0: a Climate-Driven Hydrological Transport Model that Simulates Discharge and Sediment Load leaving a River System. Computers & Geosciences, 34(10), 1170-1183, doi:10.1016/j.cageo.2008.02.008.
- Syvitski, J.P.M., Morehead, M.D. and Nicholson, M., 1998. HYDROTREND: A Climate-driven Hydrologic-Transport Model for Predicting Discharge and Sediment Loads to Lakes or Oceans. Computers & Geosciences, 24(1), 51-68, doi:10.1016/S0098-3004(97)00083-6.
- Syvitski, J.P.M., and J.M. Alcott, 1995. RIVER3: Simulation of River Discharge and Sediment Transport. Computers and Geosciences, 21(1), 89-101, doi:10.1016/0098-3004(94)00062-Y.
- ↑ Steckler, M., Swift, D., Syvitski, J., Goff, J., and Niedoroda, A., 1996. Modeling the sedimentology and stratigraphy of continental margins. Oceanography, 9, 183-188. [web-pdf]
- ↑ Syvitski, J.P.M., and Alcott, J.M., 1995. DELTA6: Numerical simulation of basin sedimentation affected by slope failure and debris flow runout. In Proceedings of the Pierre Beghin International Workshop on Rapid Gravitational Mass Movements, pp. 180-195. 6-10 December, 1993, Grenoble, France.
- ↑ Moore, R.D., 1992. Hydrological responses to climatic variations in a glacierized watershed: inferences from a conceptual streamflow model. In Using Hydrometric Data to Detect and Monitor Climate Change, Proceedings NHRI Symposium, No. 8, April (1991), pp. 9-20, NHRI Saskatoon.
- ↑ Syvitski, J.P.M., and Andrews, J.T., 1994. Climate change: numerical modelling of sedimentation and coastal processes, eastern Canadian Arctic. Arctic and Alpine research, 26, 199-212.
- ↑ 5.0 5.1 5.2 5.3 5.4 Syvitski, J.P.M. and Milliman, J.D., 2007, Geology, geography and humans battle for dominance over the delivery of sediment to the coastal ocean. J. Geology 115, 1–19. doi:10.1086/509246
- ↑ Vörösmarty, C.J., Meybeck, M., Fekete, B., and Sharma, K. (1997) The potential of neo-Castorization on sediment transport by the global network of rivers. Human Impact on Erosion and Sedimentation, IAHS, 245, 261-273.
- ↑ Verstraeten G., and Poesen, J. (2000) Estimating trap efficiency of small reservoirs and ponds: methods and implications for the assessment of sediment yield. Progress in Physical Geography, 24, 219-251. doi:10.1177/030913330002400204
- ↑ 8.0 8.1 8.2 8.3 Leopold, L.B. and T. Maddock, 1953. “The Hydraulic Geometry of Stream Channels and Some Physiographic Implications”, U.S. Geological Survey Professional Paper 252.
- ↑ Morehead, M.D., Syvitski, J.P.M., Hutton, E.W.H., Peckham, S.D., 2003. Modeling the temporal variability in the flux of sediment from ungauged river basins. Global and Planetary Change, 39, 95-110. doi:10.1016/S0921-8181(03)00019-5
- ↑ Bagnold, R.A., 1966. An approach to the sediment transport problem from general physics. US Geological Survey Professional Paper, 422, 1-37.