CIRCULATION WEATHER TYPES AS A KEY FACTOR ON RUNOFF INITIATION AND SEDIMENT DETACHMENT IN MEDITERRANEAN SHRUBLANDS

被引:3
作者
Rodrigo-Comino, Jesus [1 ]
Senciales-Gonzalez, Jose Maria [2 ]
Albarracin, Ana Perez [3 ]
Bandala, Erick R. [4 ]
Saneugenio, Francisco Escriva [3 ]
Keesstra, Saskia D. [1 ,5 ]
Cerda, Artemi [3 ]
机构
[1] Univ Granada, Fac Filosofia & Letras, Dept Anal Geog Reg & Geog Fis, Campus Univ Cartuja, Granada 18071, Spain
[2] Malaga Univ, Dept Geog, Campus Teatinos S-N, Malaga 29071, Spain
[3] Univ Valencia, Dept Geog, Soil Eros & Degradat Res Grp, Blasco Ibanez 28, Valencia 46010, Spain
[4] Desert Res Inst, Div Hydrol Sci, 755 E Flamingo Rd, Las Vegas, NV 89119 USA
[5] Wageningen Univ & Res, Wageningen Environm Res, Team Soil Water & Land Use, Wageningen, Netherlands
来源
CUADERNOS DE INVESTIGACION GEOGRAFICA | 2023年 / 49卷 / 02期
关键词
Precipitation; Soil erosion; Land management; Human-affected ecosystems; Regional issues; CLIMATE-CHANGE IMPACTS; SOIL-EROSION CONTROL; VALENCIA REGION; SPATIAL VARIABILITY; EPHEMERAL STREAMS; WATER EROSION; FLOOD EVENTS; FLASH-FLOOD; YIELD; CLASSIFICATION;
D O I
10.18172/cig.5506
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
In this research, the circulation weather types (CWTs) associated with individual surface pressure data at different atmospheric heights were used to correlate and quantify soil erosion events collecting soil loss (g m-2), runoff (l m-2) and sediment concentration (g L-1) using field plots and sediment collectors. Representative Mediterranean shrubland, located at Sierra de Enguera (Eastern Spain), was used as a case study where 213 rainfall episodes and related soil loss events were recorded for the 2010-2014 period. Average annual precipitation of 544 mm was registered, summarizing a total of 2,720.1 mm for the five years of the research period. A total of 34.4% of the registered precipitation events ranged from 10 to 29.9 mm, 23.5% from 30 to 49.9 mm, and 15.9% from 50 to 99.9 mm. The dynamic low-pressure with fronts (DLp+f) CWT was found to generate the highest precipitation amount reaching 60.6% of the total precipitation (105 of the 213 events). Over a third (35%) of the precipitation events occurred during Eastern CWT, which accounted for 48% of the total precipitation with average values of 17.6 mm per event. From the total runoff, 65.6% was related to the combined Eastern and cold drops (CD) CWT. The DLp+f CWT was found to produce 48.9% of sediment mobilization, of which 73.5% of this amount was generated by Eastern CWT. The highest sediment concentration event was found for the southern CWT under thermal low-pressure (TLp) reaching 51.65 g L-1, followed by A (anticyclones) with the Eastern CWT (42.23 g L-1). As a whole, the southern is the CWT generating the highest average sediment concentration (28.66 g L-1), followed by Easter CWT. Our findings suggest that CWTs contribute to foreseeing the periods with the highest soil losses and may help to prevent them. We discuss the need to analyse the changes in soil erosion rates due to CWT to better characterize the soil erosion process and assess the soil erosion rates, improve the current soil erosion models and investigate how climate change is changing the role CWT plays in runoff initiation and sediment delivery.
引用
收藏
页码:29 / 49
页数:21
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