Results for flood recession crop... translation from English to Chinese (Simplified)

these structures are found in areas where big rivers traverse dryland plains, such as the nile valley, where farmers synchronize planting with flood recession and the subsequent rains.
这些结构常见于大江河横向穿过干旱地区平原的地区，例如尼罗河流域，这里的农民在洪水退后雨季到来时同时种植作物。

(a) the pre-sahelian or senegal river zone, which is characterized by annual rainfall of as much as 300-400 mm and flood recession agriculture;
萨赫勒以南或塞内加尔河气候区，年降雨量多大300-400毫米，以洪泛地农业为主；

flooding was needed in the area for flood recession agriculture, but there was an immediate negative impact causing population displacement, submersion of low-lying fields, increased health hazards and difficult access to those in need of humanitarian assistance.
在洪水漫灌农业区是需要漫灌的，但也立即造成负面影响，使人民流离失所、低漥地区淹没、对健康的危害性增加、以及难以接触到那些需要人道主义援助的人。