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ｌ洛杉矶县水土保持概要 洛杉矾县总面积 １０ ５７５ ｋｍｚ，其中 ２５％是山地，６５％是丘陵、谷地、沙漠，余下的是海岸平原。其中圣迭戈河流经县内汇入太平洋。另外圣迭戈山地为风化花岗岩地带，频繁发生的森林火灾使这里的植被贫乏。 汛期为 １０月 １５日～ ４月 １５
Los Angeles County Soil and Water Conservation Summary Los Angeles County has a total area of 10575 km2, 25% of which are mountainous areas, 65% of which are hills, valleys and deserts, and the rest are coastal plains. The San Diego River flows into the Pacific Ocean through the county. In addition, the San Diego mountains are weathered granite areas. Frequent forest fires make the vegetation poor. The flood season is from October 15 to April 15