@article{fdi:010055938, title = {{B}asin-scale analysis of rainfall and runoff in {P}eru (1969-2004) : {P}acific, {T}iticaca and {A}mazonas drainages}, author = {{C}asimiro, {W}. {S}. {L}. and {R}onchail, {J}. and {L}abat, {D}. and {E}spinoza, {J}. {C}. and {G}uyot, {J}ean-{L}oup}, editor = {}, language = {{ENG}}, abstract = {{A}ccording to the {P}eruvian agricultural ministry, the {P}acific watersheds where the great cities and intense farming are located only benefit from 1% of the available freshwater in {P}eru. {H}ence a thorough knowledge of the hydrology of this region is of particular importance. {I}n the paper, analysis of this region and of the two other main {P}eruvian drainages, the {T}iticaca and {A}mazonas are reported. {R}ainfall and runoff data collected by the {P}eruvian {N}ational {S}ervice of {M}eteorology and {H}ydrology ({SENAMHI}) and controlled under the {H}ydrogeodynamics of the {A}mazon {B}asin ({H}y{BA}m) project is the basis of this basin-scale study that covers the 1969-2004 period. {B}eyond the strong contrasting rainfall conditions that differentiate the dry coastal basins and the wet eastern lowlands, details are given about in situ runoff and per basin rainfall distribution in these regions, and about their different altitude-rainfall relationships. {R}ainfall and runoff variability is strong in the coastal basins at seasonal and inter-annual time scales, and related to extreme {E}l {N}ino events in the {P}acific {O}cean. {H}owever, rainfall and runoff are more regular in the {A}ndes and {A}mazonas at the inter-annual time scale. {W}arm sea-surface temperatures in the northern tropical {A}tlantic tend to produce drought in the southern {A}ndes basins. {M}oreover, significant trends and change-points are observed in the runoff data of {A}mazonas basins where rainfall and runoff decrease, especially after the mid-1980s and during the low-stage season. {A}lmost all the coastal basins show some change in minimum runoff during the last 35 years while no change is observed in rainfall. {T}his means that human activity may have changed runoff in this region of {P}eru, but this hypothesis deserves more study.}, keywords = {rainfall ; runoff ; {T}iticaca basin ; {A}mazon ; {P}acific coast ; {P}eru ; tropical ; {A}tlantic}, booktitle = {}, journal = {{H}ydrological {S}ciences {J}ournal = {J}ournal des {S}ciences {H}ydrologiques}, volume = {57}, numero = {4}, pages = {625--642}, ISSN = {0262-6667}, year = {2012}, DOI = {10.1080/02626667.2012.672985}, URL = {https://www.documentation.ird.fr/hor/fdi:010055938}, }