@article{fdi:010073882,
  title = {{H}ydrological parameter estimation for ungauged basin based on satellite altimeter data and discharge modeling : a simulation for the {C}aqueta {R}iver ({A}mazonian {B}asin, {C}olombia)},
  author = {{L}eon, {J}.{G}. and {S}eyler, {F}r{\'e}d{\'e}rique and {C}almant, {S}t{\'e}phane and {B}onnet, {M}arie-{P}aule and {C}auhop{\'e}, {M}athilde},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he main objective of this paper is to review the usefulness of altimetric data in ungauged or very poorly monitored basin. {I}t is shown that altimetric measurements can be combined with a single in-situ gauge to derive a reliable stage-discharge relationship upstream from the gauge. {T}he {C}aqueta {R}iver in the {C}olombian {A}mazon {B}asin was selected to simulate a poorly monitored basin. {T}hus it was possible to derive the stage-discharge relationship for 13 "virtual gauge stations' defined at river crossing with radar altimetric ground tracks. {S}tage measurements are derived from altimetric data following the methodology developed by {L}eon et al. (2006). {D}ischarge is modeled using {PROGUM} - a flow routing model based on the {M}uskingum {C}unge ({M}-{C}) approach considering a diffusion-cum-dynamic wave propagation ({L}eon et al., 2006) using a single gauge located downstream from the basin under study. {R}ating curve parameters at virtual stations are estimated by fitting with a power law the temporal series of water surface altitude derived from satellite measurements and the modelled discharges. {T}he methodology allows the ellipsoidal height of effective zero flow to be estimated. {T}his parameter is a good proxy of the mean water depth from which the bottom slope of the reaches can be computed. {V}alidation has been conducted by comparing the results with stages and discharges measured at five other gauges available on the {C}aqueta basin. {O}utflow errors range from 10% to 20% between the upper basin and the lower basin, respectively. {M}ean absolute differences less than 1.10 m between estimated equivalent water depth and measured water depth indicates the reliability of the proposed method. {F}inally, a 1.2×10<sup>-4</sup> mm<sup>-1</sup> mean bottom slope has been obtained for the 730 km long reach of the {C}aqueta main stream considered.},
  keywords = {{COLOMBIE} ; {AMAZONIE}},
  booktitle = {},
  journal = {{H}ydrology and {E}arth {S}ystem {S}ciences {D}iscussions},
  volume = {3},
  numero = {5},
  pages = {3023--3059},
  year = {2006},
  DOI = {10.5194/hessd-3-3023-2006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073882},
}