From HandWiki
Short description: Cross-state initiative for unified data preparation and collection
Logo of the LamaH-datasets

LamaH (Large-Sample Data for Hydrology and Environmental Sciences) is a cross-state initiative for unified data preparation and collection in the field of catchment hydrology. Hydrological datasets, for example, are an integral component for creating flood forecasting models.


LamaH datasets always consist of a combination of meteorological time series (e.g., precipitation, temperature) and hydrologically relevant catchment attributes (e.g., elevation, slope, forest area, soil, bedrock) aggregated over the respective catchment as well as associated hydrological time series at the catchment outlet (discharge). By evaluating the large and heterogeneous sample (large-sample) of catchments, it is possible to gain insights into the hydrological cycle that would probably not be achievable with local and small-scale studies. The structure of the dataset allows an evaluation based on machine learning methods (deep learning). The accompanying paper explains not only the data preparation but also any limitations, uncertainties and possible applications. [1]

Difference to CAMELS

The LamaH datasets are quite similar to the CAMELS datasets, but additionally feature: [1]

  • Further basin delineations (based on intermediate catchments) and attributes (e.g. flow distance and altitude difference between two topologically adjacent discharge gauges), enabling the setup of a interconnected hydrological network
  • Attributes for classifying catchments and runoff gauges according to the degree and type of (anthropogenic) influence


LamaH datasets are available for the following regions:

  • Central Europe (Austria and its hydrological upstream areas in Germany, Czech Republic, Switzerland, Slovakia, Italy, Liechtenstein, Slovenia and Hungary) / 859 catchments [1]

CAMELS datasets are available for (ranked by publication date):

  • Contiguous USA (exclusive Alaska and Hawaii) / 671 catchments [2][3]
  • Chile / 516 catchments [4]
  • Brazil / 897 catchments [5]
  • Great Britain / 671 catchments [6]
  • Australia / 222 catchments [7]

Both the CAMELS and LamaH datasets are licensed with Creative Commons and are therefore available barrier-free for the public.


  1. 1.0 1.1 1.2 Klingler, Christoph; Schulz, Karsten; Herrnegger, Mathew (2021-09-16). "LamaH-CE: LArge-SaMple DAta for Hydrology and Environmental Sciences for Central Europe" (in en). Earth System Science Data 13 (9): 4529–4565. doi:10.5194/essd-13-4529-2021. ISSN 1866-3516. 
  2. Addor, Nans; Newman, Andrew J.; Mizukami, Naoki; Clark, Martyn P. (2017-10-20). "The CAMELS data set: catchment attributes and meteorology for large-sample studies" (in en). Hydrology and Earth System Sciences 21 (10): 5293–5313. doi:10.5194/hess-21-5293-2017. ISSN 1607-7938. 
  3. Newman, A. J.; Clark, M. P.; Sampson, K.; Wood, A.; Hay, L. E.; Bock, A.; Viger, R. J.; Blodgett, D. et al. (2015-01-14). "Development of a large-sample watershed-scale hydrometeorological data set for the contiguous USA: data set characteristics and assessment of regional variability in hydrologic model performance" (in en). Hydrology and Earth System Sciences 19 (1): 209–223. doi:10.5194/hess-19-209-2015. ISSN 1607-7938. 
  4. Alvarez-Garreton, Camila; Mendoza, Pablo A.; Boisier, Juan Pablo; Addor, Nans; Galleguillos, Mauricio; Zambrano-Bigiarini, Mauricio; Lara, Antonio; Puelma, Cristóbal et al. (2018-11-13). "The CAMELS-CL dataset: catchment attributes and meteorology for large sample studies – Chile dataset" (in en). Hydrology and Earth System Sciences 22 (11): 5817–5846. doi:10.5194/hess-22-5817-2018. ISSN 1607-7938. 
  5. Chagas, Vinícius B. P.; Chaffe, Pedro L. B.; Addor, Nans; Fan, Fernando M.; Fleischmann, Ayan S.; Paiva, Rodrigo C. D.; Siqueira, Vinícius A. (2020-09-08). "CAMELS-BR: hydrometeorological time series and landscape attributes for 897 catchments in Brazil" (in en). Earth System Science Data 12 (3): 2075–2096. doi:10.5194/essd-12-2075-2020. ISSN 1866-3516. 
  6. Coxon, Gemma; Addor, Nans; Bloomfield, John P.; Freer, Jim; Fry, Matt; Hannaford, Jamie; Howden, Nicholas J. K.; Lane, Rosanna et al. (2020-10-12). "CAMELS-GB: hydrometeorological time series and landscape attributes for 671 catchments in Great Britain" (in en). Earth System Science Data 12 (4): 2459–2483. doi:10.5194/essd-12-2459-2020. ISSN 1866-3516. 
  7. Fowler, Keirnan J. A.; Acharya, Suwash Chandra; Addor, Nans; Chou, Chihchung; Peel, Murray C. (2021-08-06). "CAMELS-AUS: hydrometeorological time series and landscape attributes for 222 catchments in Australia" (in en). Earth System Science Data 13 (8): 3847–3867. doi:10.5194/essd-13-3847-2021. ISSN 1866-3516.