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|Title: ||Evaluation of Normalized Difference Water Index as a Tool for Monitoring Pasture Seasonal and Inter-Annual Variability in a Mediterranean Agro-Silvo-Pastoral System|
|Authors: ||Serrano, João|
Marques da Silva, J.
soil moisture content
pasture moisture content
|Issue Date: ||Jan-2019|
|Citation: ||Serrano, J., Shahidian, S., Marques Da Silva, J. (2019). Evaluation of Normalized Difference Water Index as A Tool for Monitoring Pasture Seasonal and Inter-Annual Variability in A Mediterranean Agro-Silvo-Pastoral System. Water 2019, 11(1), 62; https://doi.org/10.3390/w11010062|
|Abstract: ||Extensive animal production in Iberian Peninsula is based on pastures, integrated within
the important agro-silvo-pastoral system, named “montado” in Portugal and “dehesa” in Spain.
Temperature and precipitation are the main driving climatic factors affecting agricultural productivity
and, in dryland pastures, the hydrological cycle of soil, identified by soil moisture content (SMC),
is the main engine of the vegetation development. The objective of this work was to evaluate the
normalized difference water index (NDWI) based on Sentinel-2 imagery as a tool for monitoring
pasture seasonal dynamics and inter-annual variability in a Mediterranean agro-silvo-pastoral system.
Forty-one valid NDWI records were used between January and June 2016 and between January 2017
and June 2018. The 2.3 ha experimental field is located within the “Mitra” farm, in the South of
Portugal. Soil moisture content, pasture moisture content (PMC), pasture surface temperature (Tir),
pasture biomass productivity and pasture quality degradation index (PQDI) were evaluated in 12
satellite pixels (10 m 10 m). The results show significant correlations (p < 0.01) between NDWI and:
(i) SMC (R2 = 0.7548); (ii) PMC (R2 = 0.8938); (iii) Tir (R2 = 0.5428); (iv) biomass (R2 = 0.7556); and (v)
PQDI (R2 = 0.7333). These findings suggest that satellite-derived NDWI can be used in site-specific
management of “montado” ecosystem to support farmers’ decision making.|
|Appears in Collections:||ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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