The duly constituted board of assessors of the levee district, drainage district, or levee and drainage district, which shall have consolidated the duties, obligations, and purposes required of it by the acts under which it was originally created, and acts amendatory thereto, with the duties, obligations, and purposes required of it to carry out the flood control and drainage operations assumed by it under subchapter 2 of this chapter, and amendments thereto, shall constitute a board of assessors for the purpose of ascertaining, determining, and fixing the increase in value or betterment which will annually accrue to the lands, town lots, suburban lots, rural lots, industrial tracts, blocks, railroads, tramroads, telegraph, telephone, and electric power lines and underground cables, pipelines, and all other real property and interests in real property within the boundaries of the district.