Europe’s Sentinel-1A satellite has shown that a Mekong River Delta – one of a world’s vital rice-growing areas – saw a poignant dump in capability over a past year, illustrating a outcome of El Niño on food security.
Since a finish of 2015, dry conditions compared with El Niño have strongly influenced South East Asia, heading to serious drought, in sold in Vietnam’s Mekong Delta.
Rice stand expansion in a Mekong Delta
River H2O levels are during a lowest available in 90 years in many places, causing some-more serious and progressing salt H2O penetration than prior years.
According to UN charitable response reports, internal farmers are coping with a drought and increasing H2O salinity by shortening their stand area.
The Sentinel-1 goal is assisting to map and guard rice production. It carries an modernized radar that can see by all continue conditions – essential in cloud-prone South East Asia – and is rarely supportive to changes in waterlogged belligerent such as rice paddies.
“The visit observations by Sentinel-1 over a categorical rice prolongation areas and a giveaway entrance make a goal an indispensable item for rice monitoring in a region,” pronounced Thuy Le Toan from France’s CESBIO institute.
“Rice fields during opposite expansion stages have been mapped by Sentinel-1A scarcely each 12 days given Oct 2014. Comparing a rice area in mid-March 2015 and mid-March 2016 indicates a diminution of about 276 600 hectares of rice grown area – a rebate of 16.7%.”
Rice is a many vicious stand for tellurian expenditure and is eaten by some-more than half of a world`s race each day, with Asia representing a largest prolongation and expenditure region.
Ensuring there is adequate affordable rice for everybody is vicious for tellurian food security, definition that impassioned continue conditions, such as those caused by El Nino, have a approach impact on how many food is traded and hence brought to a list during an affordable price.
Following a thespian tellurian food cost spike in in 2007–08, a G20 cultivation ministers launched a Group on Earth Observations Global Agricultural Monitoring Initiative – or Geoglam.
The initiative’s categorical purpose is to strengthen timely stand monitoring information with Earth-observing satellite to assistance revoke food cost instability.
Geoglam is a collaborative bid of tellurian rural stakeholders and space agencies such as such as a UN Food and Agriculture Organisation, a World Food Programme and Japan’s JAXA space agency. ESA’s GEO-Rice plan is dedicated to develop, countenance and denote dedicated rice monitoring products formed on Sentinel-1 observations in support of Geoglam.
The information from Sentinel-1 is essential for policymakers from internal to country-wide, improving estimates for inhabitant rural statistics, formulation use activities or assessing repairs from healthy disasters, informing stand insurances for smallholders or monitoring charge practices and pointing farming.
The information are also being used to guard rice stand expansion in northern Vietnam’s Red River Delta, a country’s second many vicious rice producing area.
Sentinel-1 is a two-satellite mission. The initial satellite, Sentinel-1A, now has a revisit time of once each 12 days over vicious rice areas. After a sister Sentinel-1B is launched on 22 Apr and is brought into service, coverage will be achieved each 6 days. This will concede for some-more visit updates on rice crops – essential for optimising a prolongation of Asia’s categorical food resource.
“Sentinel-1A has already demonstrated a good value for monitoring rice crops during a vast scale, as it provides information of tip peculiarity over vast areas during 20 m resolution, in a systematic way, with a high revisit frequency,” pronounced Francesco Holecz from sarmap and an consultant in rice stand monitoring with remote intuiting data.
“For a initial time, this allows maps during inhabitant turn to be generated, containing timely, accurate and minute information.
“Once Sentinel-1B is operational, a goal will be a diversion changer in a operational monitoring of rice, and also in ubiquitous for cultivation and timberland monitoring.”