Sindija Liepa, Inga Grīnfelde, Jovita Pilecka-Uļčugačeva, Kristine Valujeva, Juris Burlakovs. THE CONCEPTUAL FRAMEWORK OF DEVELOPMENT OF ENVIRONMENTALLY FRIENDLY LAND DRAINAGE SYSTEM ELEMENTS TECHNICAL SOLUTIONS. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Water Resources. Forest, Marine and Ocean Ecosystems, 2021, pp. 279-288. https://doi.org/10.5593/sgem2021/3.1/s12.43