Temporal dynamics of soil water balance components in a karst range in southeastern Spain: estimation of potential recharge

被引:27
作者
Canton, Yolanda [1 ]
Villagarcia, Luis [2 ]
Jose Moro, Maria [3 ]
Serrano-Ortiz, Penelope [4 ,5 ]
Were, Ana [6 ]
Javier Alcala, Francisco [7 ]
Kowalski, Andrew S. [4 ,8 ]
Sole-Benet, Alberto [7 ]
Lazaro, Roberto [7 ]
Domingo, Francisco [7 ,9 ]
机构
[1] Univ Almeria, Dept Edafol & Quim Agr, E-04120 La Canada De San Urbano, Almeria, Spain
[2] Univ Pablo Olavide, Dept Sistemas Fis & Quim, E-41013 Seville, Spain
[3] Univ Alicante, Dept Ecol, E-03080 Alicante, Spain
[4] Ctr Andaluz Medio Ambiente CEAMA, E-18006 Granada, Spain
[5] Univ Antwerp, Dept Biol, B-2610 Antwerp, Belgium
[6] Vrije Univ Amsterdam, Dept Hydrol & Geoenvironm Sci, NL-1081 HV Amsterdam, Netherlands
[7] Estn Expt Zonas Aridas, E-04120 La Canada De San Urbano, Almeria, Spain
[8] Univ Granada, Dept Fis Aplicada, E-18071 Granada, Spain
[9] Univ Almeria, Dept Biol Vegetal & Ecol, E-04120 La Canada De San Urbano, Almeria, Spain
来源
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES | 2010年 / 55卷 / 05期
关键词
potential recharge; evapotranspiration; soil moisture; soil water balance; Mediterranean; Sierra de Gador; ESTIMATING GROUNDWATER RECHARGE; EVAPOTRANSPIRATION; MOISTURE; SIERRA; GADOR; VEGETATION; HILLSLOPE; FIELD; ECOSYSTEMS; MOVEMENT;
D O I
10.1080/02626667.2010.490530
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
This paper analyses the temporal dynamics of soil water balance components in a representative recharge area of the Sierra de Gador (Almeria, southeastern Spain) in two hydrological years. Two approaches are used to estimate daily potential recharge (PR): Approach 1 based on deriving PR from the water balance as the difference between measurements of rainfall (P) and actual evapotranspiration (E) obtained by eddy covariance; and Approach 2 with PR obtained from the dynamic pattern of the soil moisture (theta) recorded at two depths in the site's thin soil (average 0.35 m thickess). For the hydrological year 2003/04, which was slightly drier than the 30-year average, E accounted for 64% of rainfall and occurred mainly in late spring and early summer. The PR estimated by Approach 1 was 181 +/- 18 mm year(-1) (36% of rainfall), suggesting an effective groundwater recharge in the study area. In the unusually dry hydrological year 2004/05, E was about 215 mm year-1, close to the annual rainfall input, and allowing very little (8 +/- 12 mm year-1) PR according to Approach 1. Estimation of PR based on Approach 2 resulted in PR rates lower than those found by Approach 1, because Approach 2 does not take into account the recharge that occurs through preferential flow pathways (cracks, joints and fissures) which were not monitored with the theta probes. Moreover, using Approach 2, the PR estimates differed widely depending on the time scale considered: with daily mean theta data, PR estimation was lower, especially in late spring, while theta data at 30 min resolution yielded a more reliable prediction of the fraction of total PR resulting from the downward movement of soil water by gravity.
引用
收藏
页码:737 / 753
页数:17
相关论文
共 76 条