Satellite monitoring of winter irrigation activity in South Kazakhstan: A case study of Golognaya Step irrigated region
Спутниковый мониторинг зимней промывки пашни от вторичного засоления на примере ирригационного массива «Голодная степь» (Южный Казахстан)
Abayev N.N. Sagatdinova G.N. Maglinets Yu.A. Amirgaliyev E.N. Savin I.Yu. Terekhov A.G.
2023Space Research Institute of the Russian Academy of Sciences
Sovremennye Problemy Distantsionnogo Zondirovaniya Zemli iz Kosmosa
2023#20Issue 3152 - 163 pp.
The Kazakh part of a large irrigated area called Golodnaya Step is located in the Syr Darya River basin on the state border with Uzbekistan. In this region, the cheapest agricultural practice of furrow irrigation is used. This agrotechnology uses a significant amount of irrigation water, which causes a rise of saline groundwater level and activates the processes of secondary soil salinization. The regional approach of washing the saline soils on irrigated land is a procedure of winter irrigation. During winter irrigation, water mirrors are formed. Mirrors can exist for up to several months. The higher soil salinity, the more washing water it is recommended to use during winter irrigation. Satellite registration of the January-February water mirrors allows us to quantitatively characterize the procedure of washing soil salinity. In this research, the Landsat-8, -9 and Sentinel-1, -2 archives for the period January-February 2017-2022 were analyzed using Google Earth Engine. Seasonal January-February water mirror masks were created, average long-term conditions and seasonal deviations from them were calculated. Maps of deviations from the average long-term condition represent important information about the seasonal farming activity of soil salinity washing. Long-term average estimates of winter irrigation activity characterize the average long-term level of secondary soil salinity in the region. These research results may be of interest as a separate component of soil salinity monitoring, as well as for planning improvements to the regional irrigation and drainage infrastructure.
monitoring of irrigated arable land , remote sensing , secondary soil salinity , water mirror , winter irrigation
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Institute of Information and Computational Technologies, Almaty, 050010, Kazakhstan
SibFU Institute of Space and Information Technologies, Krasnoyarsk, 660074, Russian Federation
V. V. Dokuchaev Soil Science Institute, Moscow, 119017, Russian Federation
RSE Kazhydromet, Almaty, 050022, Kazakhstan
RUDN University, Moscow, 115093, Russian Federation
Institute of Information and Computational Technologies
SibFU Institute of Space and Information Technologies
V. V. Dokuchaev Soil Science Institute
RSE Kazhydromet
RUDN University
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