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From three ecological role level of the forest canopy , litter layer and soil layer water conservation function of the six major forest types in the small watershed of the Three Gorges Reservoir Lianxiahe quantitative research . The results show that : the canopy interception rate of 15.59% -25.45 % , 20.95% , on average , the retention capacity of the different forest types in the order mixed conifer , masson pine forest , broadleaf forest , coniferous forest, cedar forest . The litter reserves the 10.52t/hm ~ 2-21.97t/hm ~ 2, the average 16.42t/hm ~ 2 order of mixed coniferous cedar forest masson pine forest , coniferous forest , wide leaf forest, shrub ; litter MWHC 2.66mm-4.19mm, an average of 3.48mm , the order of the cedar forest , coniferous forest , mixed coniferous masson pine forest , broadleaf forest , shrubs forest. Soil layer non- capillary water storage capacity of 29.98mm-44.16mm, an average of 38.62mm , the order of the cedar forest , conifer forest, coniferous forest , masson pine forest , shrub , broad-leaved forest . In descending order of the water storage capacity of the forest vegetation cedar forest ( 51.77mm ) , mixed conifer ( 48.49mm ) , Pinus massoniana ( 46.48mm ) , coniferous forest ( 44.60mm ) , shrubs ( 37.76mm), broad-leaved forest (35.36mm). Per hectare of forest land, can be stored rain 353.6t-517.7t, the annual produce economic benefits of 236.91 yuan -346.86 . Strengthen the existing broad-leaved forest and masson pine forest in the catchment of the source of the small watershed , protection , and the implementation of closed forest and grass seedlings in sparse shrubbery . In the middle and lower reaches of mountain , the sloping land terracing farmland below 25 ° , the development of Eucommia , ginkgo , chestnut , citrus - based efficient economic forest . Actively promote Pinus - dogwood - unary conifer and broadleaf the stereo mixed forest mode . Soil erosion control , and reasonable development of tourism resources , enhance scenic construction . The key sections in a river landscape , to carry out planning and design and reconstruction of riparian forest buffers , to implement ban tending young forest lands , wasteland landscape trees planted , and the construction of tourist roads , ditches , cableway . Add lodge attractions , travel, tourism , economic development in one to create a beautiful environment , simple natural summer resort .
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