From the moneys appropriated from the reclamation account there shall be paid, upon vouchers approved by the director of ecology, the administrative expenses of the director under this chapter and such amounts as are found necessary for the investigation and survey of reclamation projects proposed to be financed in whole or in part by the director, and such amounts as may be authorized by him or her for the reclamation of lands in diking, diking improvement, drainage, drainage improvement, diking and drainage, diking and drainage improvement, irrigation and irrigation improvement districts, and such other districts as are authorized by law for the reclamation or development of waste or undeveloped lands or the rehabilitation of existing reclamation projects, and all such districts and improvement districts shall, for the purposes of this chapter be known as reclamation districts.