Your query was:

north american monsoon

HR: 1400h
AN: H33A-05
TI: Hydrological drought sensitivity to land use changes in the Yaqui River Basin
AU: * Munoz-Arriola, F
EM: fmunoz@duke.edu
AF: Civil and Environmental Engineering, Duke University, Room 121 Hudson Hall, Box 90287, Durham, NC 27708-0287, United States
AU: Lettenmaier, D P
EM: dennisl@u.washington.edu
AF: Civil and Environmental Engineering, University of Washington, 202D Wilson Ceramic Lab, Box 352700, Seattle, WA 98195-2700, United States
AB: Land-use changes affect streamflow generation. Deforestation and agricultural intensification increase streamflow while afforestation reduces it. In semiarid basins, such as the Yaqui River basin (YRB) in Northwestern Mexico, changes in streamflow generation may impact the sustainability of the current agricultural practices in the region. Water resources in the YRB are influenced by different climate-phenomena, such as the North American Monsoon, El Niño Southern Oscillation (ENSO), and the Pacific Decadal Oscillation (PDO), and by anthropogenic activities. Here we will present an evaluation of the sensitivity of drought events in the YRB to land use changes under different climatological conditions. Periods were identified where the ENSO and the PDO influence the temporal variability of streamflow from 1949 to 1999, using wavelet analysis. The drought events, which were influenced by these oscillations, were identified using the runoff-percentil anomaly. Increments of the agricultural and afforestation practices were implemented as boundary conditions, and used by the Variable Infiltration Capacity model (VIC) to simulate the hydrological surface components of the YRB. Droughts during the non-monsoon months of La Nina and the warm phase of the PDO years were sensitive to increase in crop land-use in the northernmost part of the YRB. The rest of the basin observed an increase in runoff, which reduced the drought occurrence. Drought sensitivity to afforestation was higher during the monsoon months. In neutral years followed by El Nino and in years during the cold phase of the PDO, drought sensitivity to afforestation was the highest during the monsoon months.
DE: 1812 Drought
DE: 1833 Hydroclimatology
DE: 1834 Human impacts
DE: 1872 Time series analysis (3270, 4277, 4475)
DE: 4802 Anoxic environments (0404, 1803, 4834, 4902)
SC: Hydrology [H]
MN: 2007 Joint Assembly