TY JOUR TI Ecological and geochemical state of water objects of the Ivankovskoe reservoi KW database KW GIS project KW water objects KW environmental monitoring KW pollution maps KW heavy metals KW bottom sediments KW environmental safety KW increased technogenic load KW structured query language KW network technologies JO Melioration and Water Management AU Matveev, A.V. PY 2023 IS 2022 PB ANO Editorial Board Melioration and water management