Spatio-temporal patterns and drivers of irrigation water requirement in mainland China

Agricultural Water Management, Journal Year: 2025, Volume and Issue: 308, P. 109283 - 109283

Published: Jan. 7, 2025

Language: Английский

Vegetative Index Intercalibration Between PlanetScope and Sentinel-2 Through a SkySat Classification in the Context of “Riserva San Massimo” Rice Farm in Northern Italy

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(21), P. 3921 - 3921

Published: Oct. 22, 2024

Rice farming in Italy accounts for about 50% of the EU’s rice area and production. Precision agriculture has entered scene to enhance sustainability, cut pollution, ensure food security. Various studies have used remote sensing tools like satellites drones multispectral imaging. While Sentinel-2 is highly regarded precision agriculture, it falls short specific applications, at “Riserva San Massimo” (Gropello Cairoli, Lombardia, Northern Italy) farm, where irregularly shaped crops need higher resolution frequent revisits deal with cloud cover. A prior study that compared higher-resolution PlanetScope constellation vegetative indices found a seasonal miscalibration Normalized Difference Vegetation Index (NDVI) Red Edge (NDRE). Dr. Agr. G.N. Rognoni, seasoned agronomist working this stresses importance studying radiometric intercalibration between leverage knowledge gained from him apply variable rate application (VRA). high-resolution SkySat image, taken almost simultaneously pair images, offered chance examine if irregular distribution vegetation barren land within fields might be factor observed miscalibration. Using an unsupervised pixel-based image classification technique on imagery, feasible split into two subclasses intercalibrate them separately. The results indicated combining histograms agronomists’ expertise could confirm classification. Moreover, uneven spatial does not affect object past studies, which can adjusted using methods described here, even images four days apart: first method emphasizes accuracy linear regression, histogram shifting, matching; whereas second faster utilizes only matching.

Language: Английский

Drought and Water Quality in a Semi-arid Area: Effects in Livestock Production, Agriculture and Use Urban

Water Resources Management, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Language: Английский