Multivariate power-law models for streamflow prediction in the Mekong Basin
Study region: Increasing demographic pressure and economic development in the Mekong Basin result in greater dependency on river water resources and increased vulnerability to streamflow variations. Study focus: Improved knowledge of flow variability is therefore paramount, especially in remote catc...
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2014
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/58417 |
| _version_ | 1855528475788574720 |
|---|---|
| author | Lacombe, Guillaume Douangsavanh, Somphasith Vogel, R.M. McCartney, Matthew P. Chemin, Yann H. Rebelo, Lisa-Maria Sotoukee, Touleelor |
| author_browse | Chemin, Yann H. Douangsavanh, Somphasith Lacombe, Guillaume McCartney, Matthew P. Rebelo, Lisa-Maria Sotoukee, Touleelor Vogel, R.M. |
| author_facet | Lacombe, Guillaume Douangsavanh, Somphasith Vogel, R.M. McCartney, Matthew P. Chemin, Yann H. Rebelo, Lisa-Maria Sotoukee, Touleelor |
| author_sort | Lacombe, Guillaume |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Study region: Increasing demographic pressure and economic development in the Mekong Basin result in greater dependency on river water resources and increased vulnerability to streamflow variations.
Study focus: Improved knowledge of flow variability is therefore paramount, especially in remote catchments, rarely gauged, and inhabited by vulnerable populations. We present simple multivariate power-law relationships for estimating streamflow metrics in ungauged areas, from easily obtained catchment characteristics. The relations were derived from weighted least square regression applied to streamflow, climate, soil, geographic, geomorphologic and land-cover characteristics of 65 gauged catchments in the Lower Mekong Basin. Step-wise and best subset regressions were used concurrently to maximize the prediction R-squared computed by leave-one-out cross-validations, thus ensuring parsimonious, yet accurate relationships.
New hydrological insights for the region: A combination of 3–6 explanatory variables – chosen among annual rainfall, drainage area, perimeter, elevation, slope, drainage density and latitude – is sufficient to predict a range of flow metrics with a prediction R-squared ranging from 84 to 95%. The inclusion of forest or paddy percentage coverage as an additional explanatory variable led to slight improvements in the predictive power of some of the low-flow models (lowest prediction R-squared = 89%). A physical interpretation of the model structure was possible for most of the resulting relationships. Compared to regional regression models developed in other parts of the world, this new set of equations performs reasonably well. |
| format | Journal Article |
| id | CGSpace58417 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace584172025-06-17T08:23:50Z Multivariate power-law models for streamflow prediction in the Mekong Basin Lacombe, Guillaume Douangsavanh, Somphasith Vogel, R.M. McCartney, Matthew P. Chemin, Yann H. Rebelo, Lisa-Maria Sotoukee, Touleelor river basins stream flow water resources catchment areas rain drainage land cover models Study region: Increasing demographic pressure and economic development in the Mekong Basin result in greater dependency on river water resources and increased vulnerability to streamflow variations. Study focus: Improved knowledge of flow variability is therefore paramount, especially in remote catchments, rarely gauged, and inhabited by vulnerable populations. We present simple multivariate power-law relationships for estimating streamflow metrics in ungauged areas, from easily obtained catchment characteristics. The relations were derived from weighted least square regression applied to streamflow, climate, soil, geographic, geomorphologic and land-cover characteristics of 65 gauged catchments in the Lower Mekong Basin. Step-wise and best subset regressions were used concurrently to maximize the prediction R-squared computed by leave-one-out cross-validations, thus ensuring parsimonious, yet accurate relationships. New hydrological insights for the region: A combination of 3–6 explanatory variables – chosen among annual rainfall, drainage area, perimeter, elevation, slope, drainage density and latitude – is sufficient to predict a range of flow metrics with a prediction R-squared ranging from 84 to 95%. The inclusion of forest or paddy percentage coverage as an additional explanatory variable led to slight improvements in the predictive power of some of the low-flow models (lowest prediction R-squared = 89%). A physical interpretation of the model structure was possible for most of the resulting relationships. Compared to regional regression models developed in other parts of the world, this new set of equations performs reasonably well. 2014-11 2015-03-17T14:39:57Z 2015-03-17T14:39:57Z Journal Article https://hdl.handle.net/10568/58417 en Open Access Elsevier Lacombe, Guillaume; Douangsavanh, S.; Vogel, R. M.; McCartney, Matthew; Chemin, Yann; Rebelo, Lisa-Maria; Sotoukee, Touleelor. 2014. Multivariate power-law models for streamflow prediction in the Mekong Basin. Journal of Hydrology: Regional Studies, 2:35-48. doi: https://doi.org/10.1016/j.ejrh.2014.08.002 |
| spellingShingle | river basins stream flow water resources catchment areas rain drainage land cover models Lacombe, Guillaume Douangsavanh, Somphasith Vogel, R.M. McCartney, Matthew P. Chemin, Yann H. Rebelo, Lisa-Maria Sotoukee, Touleelor Multivariate power-law models for streamflow prediction in the Mekong Basin |
| title | Multivariate power-law models for streamflow prediction in the Mekong Basin |
| title_full | Multivariate power-law models for streamflow prediction in the Mekong Basin |
| title_fullStr | Multivariate power-law models for streamflow prediction in the Mekong Basin |
| title_full_unstemmed | Multivariate power-law models for streamflow prediction in the Mekong Basin |
| title_short | Multivariate power-law models for streamflow prediction in the Mekong Basin |
| title_sort | multivariate power law models for streamflow prediction in the mekong basin |
| topic | river basins stream flow water resources catchment areas rain drainage land cover models |
| url | https://hdl.handle.net/10568/58417 |
| work_keys_str_mv | AT lacombeguillaume multivariatepowerlawmodelsforstreamflowpredictioninthemekongbasin AT douangsavanhsomphasith multivariatepowerlawmodelsforstreamflowpredictioninthemekongbasin AT vogelrm multivariatepowerlawmodelsforstreamflowpredictioninthemekongbasin AT mccartneymatthewp multivariatepowerlawmodelsforstreamflowpredictioninthemekongbasin AT cheminyannh multivariatepowerlawmodelsforstreamflowpredictioninthemekongbasin AT rebelolisamaria multivariatepowerlawmodelsforstreamflowpredictioninthemekongbasin AT sotoukeetouleelor multivariatepowerlawmodelsforstreamflowpredictioninthemekongbasin |