Regional Patterns of Baseflow Variability in Mexican Subwatersheds

Water

Víctor Salas-Aguilar¹  Fernando Paz¹  Enrique Palacios¹  Abel Quevedo¹  Antonia Macedo-Cruz¹  Carlos Ortiz¹ 

[1] Colegio de Postgraduados, Carretera México-Texcoco, Km 36.5 Montecillo, 56230 México, Mexico;

关键词: runoff;    invariance;    non-linear model;    recession parameter;    symmetry;   

DOI  :  10.3390/w8030098

来源: DOAJ

【 摘 要 】

One of the challenges faced by subwatershed hydrology is the discovery of patterns associated with climate and landscape variability with the available data. This study has three objectives: (1) to evaluate the annual recession curves; (2) to relate the recession parameter (RP) with physiographic characteristics of 21 Mexican subwatersheds in different climate regions; and (3) to formulate a Baseflow (BF) model based on a top-down approach. The RP was calibrated utilizing the largest magnitude curves. The RP was related to topographical, climate and soil variables. A non-linear model was employed to separate the baseflow which considers RP as a recharge rate. Our results show that RP increases with longitude and decreases with latitude. RP displayed a sustained non-linear behavior determined by precipitation rate and evapotranspiration replace the P/E parts with \(\frac{P}{E}\) over years and subwatersheds. The model was fit to a parameter concurrent with invariance and space-time symmetry conditions. The dispersion of our model was associated with the product of replace the P/E parts with \(\frac{P}{E}\) by the aquifer’s transmissivity. We put forward a generalized baseflow model, which made the discrimination of baseflow from direct flow in subwatersheds possible. The proposed model involves the recharge-storage-discharge relation and could be implemented in basins where there are no suitable ground-based data.

【 授权许可】

Unknown