In late Holocene, climate is dryer and cooler than that in middle Holocene, the precipitation of drainage area decreases. So runoff deceases, the width of riverbed becomes narrow.
进入全新世晚期，由于气候相对于全新世中期变得较为干燥，也较为温凉，流域来水减少，故流量减小，河床宽度变小。
The soil stores moisture during cooler weather. But most of that moisture is gone by the middle or end of the hottest months of the year.
在天气比较凉爽的时候，土壤会储存水分。但是在一年中最炎热的月份中间或结束时，水分会消失。
The soil stores moisture during cooler weather. But most of that moisture is gone by the middle or end of the hottest months of the year.
在天气比较凉爽的时候，土壤会储存水分。但是在一年中最炎热的月份中间或结束时，水分会消失。
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