@article{fdi:010075186, title = {{C}omparing the {ISBA} and {J}2000 approaches for surface flows modelling at the local scale in the {E}verest region}, author = {{E}eckman, {J}. and {N}epal, {S}. and {C}hevallier, {P}ierre and {C}amensuli, {G}. and {D}elclaux, {F}ran{\c{c}}ois and {B}oone, {A}. and {D}e {R}ouw, {A}nneke}, editor = {}, language = {{ENG}}, abstract = {{T}his paper compares the hydrological responses at the local scale of two models using different degrees of refinement to represent physical processes in sparsely instrumented mountainous {H}imalayan catchments. {T}his work presents the novelty of applying, at a small spatio-temporal scale and under the same forcing conditions, a fully distributed surface scheme based on mass and energy balance equations ({ISBA} surface scheme), and a semi-distributed calibrated model ({J}2000 hydrological model). {A} new conceptual module coupled to the {ISBA} surface scheme for flow routing is presented. {T}wo small catchments located in mid- and high- mountain environments were chosen to represent the very different climatic and physiographic characteristics of the {C}entral {H}imalayas in the {E}verest region of eastern {N}epal. {T}he results show that both models globally represent the dynamic of the processes for evaporation, quick runoff and discharge in a similar way. {T}he differences in the model structures and results mainly concern the snow processes and the soil processes. {I}n particular for the high-mountain catchment, the snow-pack simulation is shown to be the main driver of the discrepancy between the two models. {T}he sub-daily variations of snow processes are shown to significantly influence the estimation of the snow-melt contribution to discharge.}, keywords = {{C}entral {H}imalayas ; {ISBA} surface scheme ; {J}2000 model ; {W}ater budget at the local scale ; {S}tructural uncertainty ; {NEPAL} ; {HIMALAYA} ; {EVEREST}}, booktitle = {}, journal = {{J}ournal of {H}ydrology}, volume = {569}, numero = {}, pages = {705--719}, ISSN = {0022-1694}, year = {2019}, DOI = {10.1016/j.jhydrol.2018.12.022}, URL = {https://www.documentation.ird.fr/hor/fdi:010075186}, }