Next Article in Journal
Changes in Croplands as a Result of Large Scale Mining and the Associated Impact on Food Security Studied Using Time-Series Landsat Images
Next Article in Special Issue
Change Detection Accuracy and Image Properties: A Study Using Simulated Data
Previous Article in Journal
Mapping Bush Encroaching Species by Seasonal Differences in Hyperspectral Imagery
Previous Article in Special Issue
Evaluating Potential of MODIS-based Indices in Determining “Snow Gone” Stage over Forest-dominant Regions
Remote Sens. 2010, 2(6), 1439-1462; doi:10.3390/rs2061439
Article

Evidence of Hydroperiod Shortening in a Preserved System of Temporary Ponds

1,* , 1,2
 and
1
1 Department of Wetland Ecology, Estación Biológica de Doñana (CSIC), Américo Vespucio s-n, 41092- Sevilla, Spain 2 Remote Sensing and GIS Lab (LAST-EBD), Estación Biológica de Doñana (CSIC), Américo Vespucio s-n, 41092- Sevilla, Spain
* Author to whom correspondence should be addressed.
Received: 8 April 2010 / Revised: 17 May 2010 / Accepted: 21 May 2010 / Published: 1 June 2010
(This article belongs to the Special Issue Multi-Temporal Remote Sensing)
Download PDF [2782 KB, uploaded 19 June 2014]

Abstract

Based on field data simultaneous with Landsat overpasses from six different dates, we developed a robust linear model to predict subpixel fractions of water cover. The model was applied to a time series of 174 Landsat TM and ETM+ images to reconstruct the flooding regime of a system of small temporary ponds and to study their spatio-temporal changes in a 23-year period. We tried to differentiate natural fluctuations from trends in hydrologic variables (i.e., hydroperiod shortening) that may threaten the preservation of the system. Although medium-resolution remote sensing data have rarely been applied to the monitoring of small-sized wetlands, this study evidences its utility to understand the hydrology of temporary ponds at a local scale. We show that the temporary ponds in Doñana National Park constitute a large and heterogeneous system with high intra and inter-annual variability. We also evidence that the conservation value of this ecosystem is threatened by the observed tendency to shorter annual hydroperiods in recent years, probably due to aquifer exploitation. This system of temporary ponds deserves special attention for the high density and heterogeneity of natural ponds, not common in Europe. For this reason, management decisions to avoid its destruction or degradation are critical.
Keywords: remote sensing; wetlands; Mediterranean temporary pond; spatio-temporal variation; fluctuations; Landsat; multi-temporal remote sensing; wetlands; Mediterranean temporary pond; spatio-temporal variation; fluctuations; Landsat; multi-temporal
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Gómez-Rodríguez, C.; Bustamante, J.; Díaz-Paniagua, C. Evidence of Hydroperiod Shortening in a Preserved System of Temporary Ponds. Remote Sens. 2010, 2, 1439-1462.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

Cited By

[Return to top]
Remote Sens. EISSN 2072-4292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert