From where i can get data of soil moisture?

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Minjiao Lu

You can consider ISMN (International Soil Moisture Network) at

https://ismn.geo.tuwien.ac.at/

Norbert Kunert

By measuring soil moisture, cheap soil moisture sensors are available for Arduino.

http://www.ebay.de/itm/like/191098674616?chn=ps&dispItem=1

Amit Bera

Available satellite soil moisture products are from: SMOS, SMAP, ASCAT, AMSR2

NASA’s Soil Moisture Active Passive (SMAP): http://nsidc.org/data/smap/

ASCAT soil moisture product is available at http://hsaf.meteoam.it/

http://www.eumetsat.int/Home/Main/News/Features/708786

AMSRE: http://nsidc.org/data/docs/daac/ae_land3_l3_soil_moisture.gd.html

MIRAS (SMOS): http://www.esa.int/esaMI/smos/

Firoz Ahmad

Baig et al. (2014) have developed a formula for generating wetness from Landsat-8 data

widely used by scientific research

See one of my article link below

https://www.researchgate.net/publication/318755528_Land_Evaluation_in_terms_of_Agroforestry_Suitability_an_Approach_to_Improve_Livelihood_and_Reduce_Poverty_A_case_study_of_Palamu_district_Jharkhand_India

Article Land Evaluation in terms of Agroforestry Suitability, an App...

Elijah Phiri

Indeed, good source of information on soil surface moisture, quality control still going on

Elijah is correct. Quality control is still not enough. ISMN usually provides in situ soil water content (SWC) measured by dielectric sensors. However, these SWC, especially those close to the ground surface include clear diurnal changes mainly caused by the temperature effects of dielectric sensors. We are trying to eliminate these temperature effects in SWC (Kapilaratne and Lu, 2017).

Kapilaratne and Lu. 2017. Automated general temperature correction method for dielectric sensors, Journal of Hydrology 551:203–216. DOI: 10.1016/j.jhydrol.2017.05.050

Indishe Senanayake

You can get three types of data:

1. In-situ data (mostly point measurements) - Check with International Soil Moisture Network (https://ismn.geo.tuwien.ac.at/)

2. Second option is model derived data (gloabl data often comes in coarse resolution)- Look for GLDAS (https://ldas.gsfc.nasa.gov/gldas/)

3. Third option is satellite soil moisture products.

SMAP is the state-of-art mission (https://nsidc.org/). You can have surface (~ top 5 cm) soil moisture data at 36 km and 9 km resolution. Also, you can use SMOS, AMSR-E, ASCAT datasets. They give soil moisture data at coarse resolutions (~25 km - 40 km).

Nagesh Mishra

You can check Dr. Rajib Maity webpage for 0.5 degree gridded soil moisture