平通河流域防护林空间调控前后水资源利用分析

Dynamic Analysis on Utilization in the before-and-after of Shelter Forest Spatial Arrangement in the Pingtong River Watershed

通过查阅文献和利用平通河流域的固定样地观测资料,对该流域主要树种的冠层截留、枯枝落叶层持水、土壤蓄水和蒸散发的数量特征进行了分析研究。并以此为指标对该流域防护林调整前后林种水资源的利用情况进行了定量对比分析。分析表明:在对平通河流域防护林进行调整布局后,蓄水量从原来的37 912万m3减为37 135 m3,而蒸散发从21 344 m3增加到22 304万m3。通过估算,调整成林后流域内经济效益增加1.63亿元,调整后更有效地利用了流域水资源,增加了流域内农民收入。

Based on the document and investigation data of the fixed sample plot, an analysis was made of the character of canopy interception, dry branches and fallen leaves retention, soil water-holding and evapotranspiration. At the same time, the water resource utilization of various forest category was analyzed according to these indexes, and the results showed that after regulation, the water-holding decreased from 3.791 2 ×108m^3 to 3.713 5 ×10^8m^3× 10^8 m^3 ,while the evapotranspiration increased from 2. 134 4 × 10^8 m^3 to 2. 230 4 × 10^8 m^3. By means of the estimation, the economic benefit increased to 1.63 × 10^8 Yuan （ RMB）, which displayed that the water resource utilization was effective and reasonable and the peasants income increased than before in this watershed.