Irrigation Canals or Laterals on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice 320

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set represents the estimated percentage of the 1-km grid cell that is covered by or subject to the agricultural conservation practice (CP320), Irrigation Canals or Laterals on agricultural land by county. An Irrigation Canals or Laterals (ICL) is a "permanent channel constructed to convey irrigation water from the source of supply to one or more irrigated areas." (U.S. Department of Agriculture, 1995) This data set was created with geographic [...]

本数据集发布于2016年10月1日美国地质调查局（USGS）科学数据审核、批准与发布政策生效之日前；该政策依据USGS《调查手册第502.8章：基础科学实践：科学数据发布的审核与批准》制定。本数据集为按县域统计的、农田上的农业保护措施（CP320）——灌溉渠或支渠（Irrigation Canals or Laterals, ICL）所覆盖或受其管控的1公里网格单元占比估算值。灌溉渠或支渠（ICL）指“为将灌溉水从供水源输送至一处或多处灌溉区域而修建的永久性渠道”（美国农业部，1995年）。本数据集基于地理[...]构建。