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Ecological Benefits Monitoring and Assessment on Water Source Conservation Areas of Reservoir under Different Measures of Ecological Restoration

Author: WangFu
Tutor: DongZhi
School: Shandong Agricultural University
Course: Soil and Water Conservation and Desertification Combating
Keywords: Water Conservation District Ecological restoration Ecological benefits Monitoring and Evaluation Taolinkou reservoir
CLC: X171.4
Type: Master's thesis
Year: 2010
Downloads: 175
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Abstract


Water Conservation District to Taolinkou reservoir ecological restoration project, instead of through the space time, fixed semi-fixed position monitoring, a combination of field investigation and laboratory testing, monitoring vegetation types and biodiversity in different repair measures change characteristics, soil improvement, efficiency, effectiveness and water conservation water content, and membership functions to evaluate the ecological benefits of different ecological restoration measures. The research results provide a scientific basis for the quantitative evaluation of reservoir water conservation district ecological benefits of ecological restoration project is of great significance for carrying out the ecological restoration of the basin-wide and even similar region. The results show that: (1) in ecological restoration of vegetation types increased α-diversity was significantly increased ecological restoration, species richness of natural secondary forest fencing type (28 species), followed by slopes fencing-type (25 kinds) steep slopes terraced fencing type (24 kinds), open forest the replanted type (18 kinds), plantation fencing type, and slopes afforestation type (17 kinds). Plant species diversity and evenness of the different measures of the project area significantly increased, species diversity and evenness of the highest type of natural secondary forest fencing, open forest replanting slopes afforestation and steep terraced fencing type and plantation type of fencing, the lowest slopes fencing type. (2) in ecological restoration of soil structure significantly improved bulk density decreased porosity and fertility improve soil particles under different ecological restoration measures silt and sand-based, soil texture is sandy loam; soil fractal dimension than those before restoration decreases, the ecological restoration measures tend to good soil structure and stability. Ecological restoration tends to decrease soil bulk density, porosity increase. Soil bulk density lower than before restoration measures 11.23 percent to 26.94 percent, the biggest drop in a steep terraced fencing type. Total porosity after the implementation of the different recovery measures than before restoration increased 14.66% to 31.71%, 23.20% to 62.54% and from 13.19% to 33.14%, respectively, in the non-capillary porosity and capillary porosity than before restoration. Different ecological restoration measures soil organic matter content, total N, hydrolyzable nitrogen, total phosphorus, available phosphorus and available potassium increased. Organic matter content of 27.84 ~ 73.40g · kg -1 , than repair improved from 20.53% to 93.74%; total nitrogen content of 1.85 ~ 2.43 g · kg -1 , hydrolysis sexual nitrogen content of 165.86 ~ 343.43mg · kg -1 , the total phosphorus content of 7.06 ~ 9.51g · kg -1 , available phosphorus content of 5.98 ~ 14.30mg · kg the -1 , available potassium content of 60.29 ~ 145.36mg · kg -1 increased 8.19% to 44.12%, respectively over the repair, 18.59% to 46.48%, 7.02% to 15.27%, 34.15% to 64.75%, from 33.71% to 220.68%. (3) in ecological restoration of water and water conservation benefits increased significantly after the implementation of the ecological measures, fencing of natural secondary forest and plantation fencing type type of slopes fencing, steep terraced fencing type, open forest replanting type, and slopes afforestation plant communities of litter interception amount for 8.51mm, 4.51mm, 2.86mm, 3.92mm, 5.13mm and 5.22mm, ecological restoration and improved from 20.41% to 98.63%. Fencing of natural secondary forest and plantation-fencing type plant communities in effective storage were 42.25mm and 34.23mm, plant communities of soil slopes fencing and steep terraced fencing type, sparse the replanting type and the slopes afforestation effective Water capacity 19.58mm, 19.53mm, 33.06mm, 27.20mm than repair increased from 26.24% to 50.94%. Different ecological restoration measures compared banned type woodland plant communities, soil water storage than other repair measures plant communities. The ecological measures after the implementation of natural secondary forest fencing soil layer of soil held the hydraulic to 423.25 t · hm / (-2), whilst plantation fencing type 342.46t · hm / (-2), slopes fencing and steep terraced fencing type the open forest replanting type and the slopes afforestation type of soil water holding capacity were 195.84t · hm / (-2 ), 195.66t · hm / (-2), 329.53t · hm / (-2) and 271.98t · hm / (- 2), an increase of 26.28% to 50.50%. Significantly higher than the total water storage capacity of plant communities in the ecological restoration repair before. Different repair measures total water storage of natural secondary forest fencing type, total saturated water and the total effective storage 236.35mm and 50.76mm order sparse forest replanting type (222.93mm 38.19mm), artificial Lin fencing (206.86mm 38.74mm) and slopes afforestation type (168.61mm, 32.42mm), steep terraced fencing type (121.14mm, 23.45mm) and slopes fencing type (101.24mm 22.44mm). (4) the use of the membership function of ecological benefits evaluation of different ecological restoration measures results show that the ecological benefits of natural secondary forest fencing type is the best, worst and slopes fencing type, its order of natural secondary forest closure - fertility gt; the sparse forest replanting type gt ; the steep terraced sealed sterile type gt; slopes afforestation gt; the plantation sealed sterile type gt; slopes fencing type.

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CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Biology > Ecosystems and pollution ecology > Ecological construction and ecological restoration
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