Tag Archives: public policy failures

Image: Deforestation in Bolivia

By European Space Agency via Phys Org:

Credit: contains modified Copernicus Sentinel data (2019), processed by ESA, CC BY-SA 3.0 IGO

This Copernicus Sentinel-2 image features an area in the Santa Cruz Department of Bolivia, where part of the tropical dry forest has been cleared for agricultural use.

Since the 1980s, the area has been rapidly deforested owing to a large agricultural development effort where people from the Andean high plains (the Altiplano region) have been relocated to the lowlands of Bolivia.

The relatively flat lowlands and abundant rainfall make this region suitable for farming. In fact, the local climate allows farmers to benefit from two growing seasons. The region has been transformed from dense forest into a patterned expanse of agricultural land. This deforestation method, common in this part of Bolivia, is characterized by the radial patterns that can be seen clearly in the image.

Each patterned field is approximately 20 sq km and each side is around 2.5 km long.

Small settlements can be seen in the center of each individual field in the image, which typically contain a church, a school and a soccer field. These communities are joined by a road network depicted by the straight lines that bisect the radial fields and connect the adjacent areas.

Meandering streams and rivers can be seen flowing through the fields. The long, thin strips of land in the top right of the image are most likely cultivated soybean fields.

Rainforests worldwide are being destroyed at an alarming rate. This is of great concern as they play an important role in global climate, and are home to a wide variety of plants and animals.

Because of their unique perspective from space, Earth observation satellites are instrumental in providing comprehensive information on the full extent and rate of deforestation, which is particularly useful for monitoring remote areas.

This composite image was created by combing three separate Normalized Difference Vegetation Index images from the Copernicus Sentinel-2 mission. The first image, from 8 April 2019, is visible in red; the second from 22 June 2019, can be seen in green; and the third from 5 September 2019 can be seen in blue. The Normalised Difference Vegetation Index is widely used in remote sensing as it gives scientists an accurate measure of healthy and status of plant growth.

Credit: contains modified Copernicus Sentinel data (2017), processed by ESA, CC BY-SA 3.0 IGO

Bolivia’s city of Santa Cruz can be seen at the mid-left. One of the fastest growing cities in the world, this important commercial centre lies on the Pirai River in the tropical lowlands of eastern Bolivia. To the east of the city, and particularly east of the Guapay River, or the Río Grande, a huge patchwork of agricultural fields can be seen. Back in the 1960s this was an area of largely inaccessible thick Amazon forest. However, as an area of relatively flat lowland with abundant rainfall, it is suited to farming.

As part of a drive to develop and improve the economy, there has been rapid deforestation since the 1980s to accommodate programmes to resettle people from the Andean high plains and develop the area for agriculture, particularly for soybean production. This has resulted in the region being transformed from dense forest into a large mosaic of fields. As well as countless rectangular fields, radial features can be seen where individual farmers have worked outwards from a central hub of communal land.

This image was captured by the Copernicus Sentinel-2A satellite on 30 September 2017, and processed in false colour.

https://phys.org/news/2020-01-image-deforestation-bolivia.html