@article{fdi:010086386, title = {{H}ydrosedimentary monitoring of the {H}ydrothiem observatory, {E}astern tropical coast of {N}ew {C}aledonia ({SW} {P}acific)}, author = {{G}enthon, {P}ierre and {T}ramier, {C}. and {D}elvienne, {Q}. and {D}umas, {P}ascal and {R}ouch{\'e}, {N}athalie and {W}ijesuriya, {K}avya and {C}assan, {J}. {J}. and {G}oue, {A}.}, editor = {}, language = {{ENG}}, abstract = {{S}tudy region: {T}he eastern coast of {N}ew {C}aledonia ({SW} {P}acific).{S}tudy focus: {T}he {H}ydro{T}hiem hydrological observatory is devoted to the study of the impact of invasive ungulate species and bushfires on water resources, erosion and water quality in a catchment used for drinking water. {I}t includes (1) three 100 m2 plots located on characteristic land surfaces, i.e. a woody savanna submitted to bushfires every few years, a healthy forest and a forest strongly degraded by deer and wild pigs, (2) two watersheds covering areas of 25 200 m2 and 3.1 km2. {T}he first watershed includes mostly savanna while the second one is mostly constituted of humid forest. {A}vailable data include rainfall, soil moisture, discharge, and sus-pended matter concentration.{N}ew hydrological insight: {D}ischarge and erosion rates exhibit striking differences between the three plots: the healthy forest presents a 3 % runoff and almost no erosion, the degraded forest being characterized by a 90 % runoff and large erosion, the savanna presenting intermediate values of runoff and erosion. {T}he largest watershed present a 64 % runoff and an erosion rate amounting to 72 % of the one of the degraded plot. {T}his emphasizes the role of subsurface flow and of gully erosion, respectively. {R}esults from the {H}ydrothiem observatory can be used for a comparison with similar watersheds and may suggest guidelines for restoration and conservation strategies.}, keywords = {{H}ydrologic regime ; {E}rosion ; {D}egraded land surface ; {B}ushfire ; {S}avanna ; tropical forest ; {T}ropical climate ; {I}nvasive animal species ; {N}ew {C}aledonia ; {NOUVELLE} {CAL}É{DONIE} ; {ZONE} {TROPICALE} ; {PACIFIQUE} {SUD} {OUEST}}, booktitle = {}, journal = {{J}ournal of {H}ydrology : {R}egional {S}tudies}, volume = {44}, numero = {}, pages = {101223 [10 p.]}, year = {2022}, DOI = {10.1016/j.ejrh.2022.101223}, URL = {https://www.documentation.ird.fr/hor/fdi:010086386}, }