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JECAM | Joint Experiment for Crop Assessment and Monitoring

China - Guangdong/Leizhou

Project Overview

Crop identification and Crop Area Estimation

Crop Condition/Stress

Yield Prediction and Forecasting

Phenological Events and Estimation of Rice biophysical variables

Crop Biophysical Parameters Estimation


Project Reports

2015 Site Progress Report

Publications:

Zhang Xiaoqian, Guo Lin, Ma Shangjie, et al. Application of rice leaf area index monitoring using time-series SAR data[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2014, 30(13): 185-193. (in Chinese with English abstract)


Implementation Plans

The mapping resolution is 1:50,000 scale.

Timeliness (with regards to growing season): March – November.

Operational implementation plans: crop monitoring

The current project phase is research and operational pilot.

In situ Data:


Site Description

Locations

Guangdong (Leizhou)
Site Extent   Centroid: 20.87, 110.08
Top left: 20.99, 109.95 Bottom Right: 20.77, 110.16

Typical field size ranges from 0.1 to 10.0 ha. Crop types are paddy rice, sugar cane, peanut, vegetable, etc. Typical Crop Rotation is paddy rice with two harvests per year. Sowing of main rice takes place in late March and June, to be harvested in July. The second rice crop is sown in August and is harvested from late October to November. The climate is characterized by relatively high temperatures. The average temperatures is 22 Celsius and the warmest month is July with an average temperature of 28 Celsius. The coolest month is January, with an average temperature of 14 Celsius. The rainfall is evenly distributed over the entire year. In summer, the rainfall coming from the tropical cyclones. The average amount of rainfall is 2402.8 mm. The soil texture is loam. The landscape topology is flatlands and hills.

Location

Topography

Drainage class/irrigation

Crop calendar

Field size

Climate and weather

Photos of the Study Site:


Specific Project Objectives & Deliverables

Mapping Agricultural Areas:

Estimating Crop Areas; Statistical unit: country

Crop Growing Conditions Over the Growing Season: Temperature, Soil Moisture, Illumination, Meteorological hazards, etc.

Estimation of Biophysical Variables: NDVI, LAI, biomass, yield

Phenological Events

Integration of the EO-Derived Information Into Crop/Agro-Met Models

Forecasting Agricultural Variables from Crop/Agro-Met Models using near real time data.


In Situ Observations

  1. Parameter: Crop height
    Data Collection Protocol:
    Frequency: about 2 times each crop year
  2. Parameter: accuracy of rice identification
    Data Collection Protocol:

    Hundreds of points for land cover type were collected once per season

    Frequency:
  3. Parameter: Crop type
    Data Collection Protocol:

    GPS

    Frequency: 2 times each crop year
  4. Parameter: LAI
    Data Collection Protocol:

    LAI2000

    Frequency: about 2 times each crop year
  5. Parameter: planting pattern, growing stage, seeding/transplanting date, plant height, Leaf area index(LAI), weather condition and digital photos during key rice growing stages concurrently with the satellite pass
    Data Collection Protocol:

    25 sample plots

    Frequency:

EO Data Requirements

Approximate Start Date of Acquisition: April-1, Covers 2 cropping seasons
Approximate End Date of Acquisition: Oct-31
Spatial Resolution: 10m (min), 5m (preferred)
Temporal Frequency: 4 times over each season, 8 times total per year; Two harvests per year; Approximately once per growth stage; (Early Rice: Early April/Late April/Mid May/Early June. Late Rice: Early Aug./Late Aug./Mid Sep./Early Oct./Late Oct.)
Latency of Data Delivery: Weekly
Wavelengths Required: G,R,NIR,SWIR
Across Swath: 25 km
Along Track: 30 km

SAR Data Requirements

Approximate Start Date of Acquisition: April 1; Covers 2 cropping seasons
Approximate End Date of Acquisition: October 31
Spatial Resolution: 10 m (min), 5 m (preferred), Requires higher resolution due to speckle
Temporal Frequency: 4 times over each season, 8 times total per year; Two harvests per year; Approximately once per growth stage; (Early Rice: Early April/Late April/Mid May/Early June. Late Rice: Early Aug./Late Aug./Mid Sep./Early Oct./Late Oct.)
Latency of Data Delivery: weekly
Wavelengths Required: X, C and L
Polarization Dual (VV,VH) (min), Polarimetric (preferred)
Incidence Angle Restrictions: 25º to 45º
Across Track: 25 km
Along Track: 30 km

Locations

Guangdong (Leizhou)

Centroid
Latitude: 20.87
Longitude: 110.08

Site Extent
Top left
Latitude: 20.99
Longitude: 110.08
Bottom Right
Latitude: 20.77
Longitude: 110.16


Optical Sensors

SPOT, IRS P6, ALOS, Rapideye, etc
Imaging Mode: Multi-spectral
Spatial Resolution: 5 – 10 m
Acquisition Frequency: 4 - times each crop year
Pre-Processing Level: 1
Application:

JECAM | Joint Experiment for Crop Assessment and Monitoring | Group on Earth Observation

©2013 Joint Experiment for Crop Assessment and Monitoring © HER MAJESTY THE QUEEN IN RIGHT OF CANADA SA MAJESTE LA REINE DU CHEF DU CANADA (2012)