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通过对深丘区环境背景特征的研究，探讨了建设防护林体系的重要性．根据防护林体系的配置和观测体系的布置，以流域为单元、分层研究了防护林体系的综合效益。研究表明：营建后的防护林体系，可使坡面径流减少６２％，径流含沙量减少６９％，流域的年径流量和产沙量均有显著变化，森林覆被率每增加１％，年径流探减少４．２ｍｍ，泥沙减少３．７％，但枯季径流略有增加。
Through the study of the characteristics of the environmental background in the deep mound area, the importance of building a shelter forest system is discussed. According to the configuration of shelterbelt system and the arrangement of observation system, the comprehensive benefits of shelterbelt system are studied in a hierarchical way with the basin as a unit. The results show that the shelterbelt system after construction can reduce runoff of slope surface by 62%, runoff sediment content by 69%, annual runoff and sediment yield of the basin have significant changes, and forest cover rate increases by 1% every year 4.2mm less runoff exploration, sediment reduction of 3.7%, but a slight increase in dry season runoff.