Un trabajo conjunto entre científicos de Argentina y Estados Unidos produjo un esquema de trabajo que combina conocimiento de expertos y datos satelitales para validar mapas en el contexto de la Agenda 2030 de Naciones Unidas. El texto es open access y puede consultarse en la web.
Integración de conocimiento experto con datos satelitales y computación en la nube para evaluar la degradación de la tierra a escala nacional en el marco de la Agenda 2030
Título original del trabajo
Combining Earth Observations, Cloud Computing, and Expert Knowledge to Inform National Level Degradation Assessments in Support of the 2030 Development Agenda
Ingrid Teich. Instituto de Fisiología y Recursos Genéticos Vegetales (IFRGV), CIAP. Unidad de Estudios Agropecuarios (CONICET-INTA), Córdoba, Argentina.
Mariano Gonzalez Roglich, Betty and Gordon Moore Center for Science, Conservation International, Arlington, Estados Unidos.
Monitoring progress towards the 2030 Development Agenda requires the combination of traditional and new data sources in innovative workflows to maximize the generation of relevant information. We present the results of a participatory and data-driven land degradation assessment process at a national scale, which includes use of earth observation (EO) data, cloud computing, and expert knowledge for Argentina. Six different primary productivity trend maps were produced from a time series of the Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) dataset (2000–2018), including the most widely used trajectory approach and five alternative methods, which include information on the timing and magnitude of the changes. To identify the land productivity trend map which best represented ground conditions, an online application was developed, allowing 190 experts to choose the most representative result for their region of expertise nationwide. Additionally, the ability to detect decreases in land productivity of each method was assessed in 43,614 plots where deforestation had been recorded. The widely used trajectory indicator was the one selected by most experts as better reflecting changes in land condition. When comparing indicators’ performance to identify deforestation-driven reductions in productivity, the Step-Wise Approach Trend Index (SWATI), which integrates short- and long-term trends, was the one which performed the best. On average, decreases of land productivity indicate that 20% of the Argentine territory has experienced degradation processes between 2000 and 2018. The participatory data generation and verification workflow developed and tested here represents an innovative low cost, simple, and fast way to validate maps of vegetation trends and other EO-derived indicators, supporting the monitoring of progress towards land degradation neutrality by 2030.
Keywords: land degradation neutrality; NDVI; ESPI; SDG Target 15.3; participatory assessment; land productivity trend; Argentina
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