1. 云南农业大学 资源与环境学院,云南,昆明,650201
2. 云南农业大学 水利学院,云南,昆明,650201
纸质出版:2023
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段青松, 保锐琴, 黄广杰, 等. 澜沧江黄登水电站库周土壤的崩解特性[J]. 水土保持通报, 2023,43(4):195-202.
Duan Qingsong, Bao Ruiqin, Huang Guangjie, et al. Soil Disintegration Characteristics Around Huangdeng Hydropower Station Reservoir on Lancang River[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 195-202.
段青松, 保锐琴, 黄广杰, 等. 澜沧江黄登水电站库周土壤的崩解特性[J]. 水土保持通报, 2023,43(4):195-202. DOI: 10.13961/j.cnki.stbctb.2023.04.024.
Duan Qingsong, Bao Ruiqin, Huang Guangjie, et al. Soil Disintegration Characteristics Around Huangdeng Hydropower Station Reservoir on Lancang River[J]. Bulletin of Soiland Water Conservation, 2023, 43(4): 195-202. DOI: 10.13961/j.cnki.stbctb.2023.04.024.
[目的
]
研究澜沧江黄登水电站库周土壤崩解特性,为库周土壤侵蚀防控,减少入库泥沙提供依据,也为三江并流区水土保持和生态修复提供科学参考。[方法
]
采用野外调查取样与室内试验相结合的方法,测定库周5种典型土壤的崩解速率和理化性质,分析土壤崩解速率与土壤性质的相关性。[结果
]
土壤崩解性由强到弱依次为:红壤、黄棕壤、淤积土(上)、淤积土(下)、紫色土,饱和状态下,土壤平均崩解速率之比依次为8.76∶5.65∶5.24∶4.29∶1;土壤崩解性与土壤液塑限、机械组成、孔隙度等性质密切相关;土壤平均崩解速率与土壤粉粒、液塑限之间存在显著负相关,与土壤粗砂粒含量、孔隙度显著正相关,在初始含水量(ω
0
)较高时与土壤有机质、水解性氮、有效磷、全氮存在显著负相关;5种土壤在ω
0
饱和时土壤崩解速率与全氮、粉粒和液限的线性方程拟合度高(R
2
>0.9)。[结论
]
对ω
0
饱和的红壤、黄棕壤、淤积土、紫色土,可用土壤全氮含量、粉粒含量和液限来预测土壤的崩解性。对黄登电站库周的红壤和黄棕壤采取必要的林草或工程措施进行综合治理;对淤积土应种植适生的消落带植物,对紫色土在加强保护的前提下宜农则农、宜林则林,为库区乡村振兴提供更多农林用地资源。
[Objective] Soil disintegration characteristics around the Huangdeng hydropower station reservoir on the Lancang River were studied in order to provide a basis for the prevention and control of soil erosion around the reservoir
reduce the sediment entering the reservoir
and provide a reference for soil and water conservation and ecological restoration in the Three Rivers parallel flow area. [Methods] We used a combination of field survey sampling and laboratory experiments to determine the disintegration rate and physicochemical properties of five typical soils around the reservoir
and to analyze the correlation between soil disintegration rate and soil properties. [Results] Soil disintegration (ranging from strong to weak) was observed to follow the order of red soil
yellow brown soil
siltation soil (top)
siltation soil (bottom)
and purple soil. Under the saturated soil condition
the ratio of average disintegration rates was 8.76∶5.65∶5.24∶4.29∶1. Soil disintegration was closely related to the soil liquid plastic limit
mechanical composition
porosity
and other properties; There was a significant negative correlation between the average soil disintegration rate and both soil silt and liquid plastic limit. A significant positive correlation was observed between soil disintegration rate and both the content of soil coarse sand and porosity. When the initial moisture content (ω0) was high
soil disintegration rate was significantly negatively correlated with soil organic matter
hydrolytic nitrogen
available phosphorus
and total nitrogen. The linear equations between soil disintegration rate and total nitrogen
silt
and liquid plastic limit for the five soil types in the saturated state had a high fit degree (R2>0.9). [Conclusion] When ω0 was saturated for red soil
yellow brown soil
siltation soil
and purple soil
soil total nitrogen content
silt content
and liquid plastic limit can be used to predict soil disintegration. Forests and grasslands should be established and maintained or engineering measures should be implemented to treat the red soil and yellow brown soil around Huangdeng power station reservoir. Suitable water-zone plants should be planted on siltation soil. Measures should be taken to strengthen the protection of purple soil so that it is suitable for agriculture and forests. Taking these measures will provide more agricultural and forestry land resources for rural revitalization in the reservoir area.
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