但现在，这种蓄水功能弱得多了。
混交林表层土壤蓄水功能最好，其他林分各层次差异较小；
Soil retention capacity of surface layer is the best in the mixed forest, while differences are little in other forests.
通过防渗措施后，减少渗流达81.3%，恢复了水库的蓄水功能。
Seepage content was decreased 81.3%after measures of control seepage. Effect of retain water was resumed in Nanmenxia Reservior.
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