The main purpose of this work is to study the relationship between the soil electrical conductivity measured in-situ (CEe) and the satellite reflectance images of the Landsat-7 ETM sensor bands for an understanding of the spatial salinity distribution in Lambayeque. The study area was the Chacra Vieja, El Cienago fundo in the District of Lambayeque. Measurement field of CEe (dS/m) was held in the October 2007 and June 2008. The reflectance data was extracted from two satellite images taken in February 21, 2007 and February 08, 2008 from the sensor Landsat7 ETM +. Images were processed with ENVI 4.5 software and to determine the CEe of the soil samples, we used a conductivity meter, mark JENWAY 4520 and to locate the area sampling points, a GPS, Garmin was employed. The correlation coefficients (R) between the CEe in-situ and the reflectance varied from 0.062 to 0.784. The reflectance of ...

El Niño Southern Oscillation (ENSO) indices and satellite-recorded Normalized Difference Vegetation Index (NDVI) will be used to construct a drought onset prediction model for North Coast of Peru through a multiple linear regression. Monthly NDVI and ENSO indices anomaly data for the period July 1981 to December 2003 were used to develop the model. The objective of the work, first part, is to do a description of how and where the data are obtained and it does calculate their anomalies. NDVI anomaly time series, in the period 1981-2003 were compared with El Niño Southern Oscillation (ENSO) indices. A visual inspection of the anomalies plot shows a correlation in the 82-83 and 97-98 Niños. NDVI of the Loreto region in the jungle of Peru doesn’t show any change in relation to ENSO indixs.