섬유

sediment yield from a mississippi delta cotton field

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 242
sediment yield from flat (0. 2 slope) delta fields was measured during a 33-month study. annual erosion rates were higher than anticipated. highest sediment concentrations in runoff occured in the spring during the seedbed preparation and planting season when the soil was bare of vegetative cover, freshly plowed, and highly susceptible to erosion. lowest concentrations occurred in september and october when vegetative cover was good. sediment particle size data from selected storms showed that about 83 of the sediment removed from the fields was $less than$ 2 $mu$ m in diameter and nearly all, 98 was $less than$ 16 $mu$ m. field soils were composed of 24 clay, 23 silt, and 53 sand, so considerable enrichment of fine particles occurred during the erosion process. 12 refs
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