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- Title
Erosivity indicators based on rainfall in Northwestern Mexico.
- Authors
Norzagaray-Campos, Mariano; Muñoz-Sevilla, Patricia; Espinosa-Carreón, Leticia; Ruíz-Guerrero, Rosario; González-Ocampo, Héctor; Llanes-Cárdenas, Omar
- Abstract
This study is motivated by the problem of erosivity (R), exacervated in semiarid zones by intense seasonal storms. The purpose was to estimate the spatial variation ofRin a coastal area covering 37500 km2 which is one of the most important agricultural areas in northwestern Mexico. Four methods were used. Rainfall data from 11 SMN-CONAGUA weather stations (from 1966 to 2013) were used to calculateR. The annual averageR1was 1181.08, andR2was 1084.51 MJ mm ha–1h–1with ranges of 2.35–5220.55 and 2.93–4711.38 MJ mm ha–1h–1. Statistical tests showed that a transformation of the data of the formy = log (x),was appropriate for an ANOVA analysis of the data. The value of the test statistic wasF =1.77 withp= 0.149, showing interdependence between the indicatorsP(α = 0.05). The values of the correlation coefficients for the data werePvs.R1= 0.96,Pvs.R2= 0.99,Pvs.AIm= 0.98,Pvs.MFI= 0.99. The classification of risk in this region showed that 2017.5 km2 of the study area was at a very high risk of rain erosion, 2407.5 km2 under high risk, 5662.5 km2 under medium to high risk, and 14250 km2 under low risk. The results are shown on 1:10,000 maps. Results are a set of useful information for soil management programs and for cultivation planning that takes the seasonal variation ofRinto account in this region where large volumes of extensive crops are grown.
- Subjects
RAINFALL; MEASUREMENT of soil erosion; ARID regions climate; STORMS; SOIL management
- Publication
Journal of Environmental Engineering & Landscape Management, 2016, Vol 24, Issue 2, p133
- ISSN
1648-6897
- Publication type
Article
- DOI
10.3846/16486897.2015.1106405