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公益林是指以森林涵养水源、保持水土、改善环境等公益效益为经营目标的林分。文中针对广州市流溪河林场公益林涵养水源的公益效益进行计量和评价，进而提出公益林涵养水源效益补偿方法。经分析测定：全场公益林区森林土壤贮水能力为１２４６．４万ｍ３，森林调蓄率为４２．２６％。林区年迳流量７３７３．４万ｍ３，其中森林调蓄量为３１１６万ｍ３。涵养水源效益补偿值为２１９—３１２万元。
Non-commercial forest refers to the forest conservation of water, maintaining soil and water, improve the environment and other public benefit for the business objectives of the forest. In this paper, the public welfare benefit of public welfare forest in Guangzhou Liuxihe forest farm is measured and evaluated, and then the compensation method of water conservation benefit of public welfare forest is proposed. The analysis determined that: the public public forest area forest soil water storage capacity of 12.464 million m3, the forest regulation rate of 42.26%. Annual forest flow of 73.734 million m3, of which 31.16 million m3 of forest reserves. Water conservation benefit conservation value of 219-312 million.