2篇
您的检索式：作者名="Rosane Barbosa Lopes Cavalcante"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Rainfall partitioning in young clonal plantations Eucalyptus species in a subtropical environment,and implications for water and forest management显示文摘Different canopy characteristics of industrial eucalyptus may lead to differences in water evaporation and availability to plants.This study aims to understand rainfall partitioning in a young clonal plantation(age of 2-4.5 years)of three eucalyptus species by relating tree parameters:diameter at breast height,total height,and leaf area index.We measured rainfall,throughfall,stemflow and litter interception,along with the tree parameters.The eucalyptus trees had rainfall interception varying between 22 mm(for 178 mm of rainfall)and 42 mm(for 87 mm of te rainfall),throughfall between 106 mm(for 186 mm of rainfall)and 44 mm(for 74 mm of rainfall),and stemflow between 0.5 mm(for 92 mm of rainfall)and 1.4 mm(for 24 mm of rainfall).For the three species,rainfall interception varied between 12 and 48%,throughfall between 57 and 90%,and stemflow between 0.3 and 5.4%.The coefficient of determination between interception and rainfall was 0.76,indicating interception depends on other variables,possibly including antecedent rainfall,rainfall intensity,and seasonality.Interception decreased with a reduction in leaf area index caused by eucalyptus defoliation.The E.benthamii had 0.75 mm of throughfall per 1 mm of rainfall,whereas in E.dunnii and E saligna,these ratios were 0.71 and 0.68,respectively.Stemflow in E.benthamii and E.dunii had a higher positive relationship with the diameter at breast height of the trees,whereas in E.saligna the highest relationship was with the rainfall.These results contribute to establishing management strategies,such as choosing suitable eucalyptus species to local climate,and to improve the synchronization of crop-demand versus soil-water-supply while maintaining streamflow to fulfill ecological and production needs. | Decio Oscar Cardoso Ferreto JoséMiguel Reichert Rosane Barbosa Lopes Cavalcante Raghavan Srinivasan | 2021 | International Soil and Water Conservation Research2021，9，3： | 1 |
| 2 | Event-based hydrology and sedimentation in paired watersheds under commercial eucalyptus and grasslands in the Brazilian Pampa biome显示文摘Ecological and hydrological impacts are expected when watersheds are under commercial eucalyptus.In this study we evaluated event-based hydrology and sedimentation in paired watersheds under commercial eucalyptus and grasslands cover.Flow,suspended sediment concentration,and sediment production were measured and simulated with the Limburg Soil Erosion Model(LISEM)in paired hydrographic watersheds located in southern Brazil;one occupied with 7-years old Eucalyptus saligna plantation(forest watershed-FW;0.83 km^(2))and another Pampa biome with native and exotic grasses used for beef cattle production(grassland watershed-GW;1.10 km^(2)).The effect of rainfall on hydrological and sedimentological variables was more evident in GW compared with FW.The shape of the hydrograph was steepest in GW,with rapid,marked increase and decrease in flow during rainfall.The parameters changed for model calibration in FW and GW were soil saturated hydraulic conductivity,initial soil moisture,and Manning roughness coefficient,whereby the statistical performance was classified as good(NSE>0.75).Fourteen events different from those used in the calibration process were validated for FW and GW,with NSE index classified as“good”and“very good”for hydrology.Our study shows limitations of LISEM in calibrating and validating the sediment yield for individual events due to the spatial variability of factors controlling soil erosion.The validated modeling results of this study may be applied in simulating soil and crop scenarios in watersheds cultivated with commercial forest and grassland for grazing. | Ederson Diniz Ebling Jose Miguel Reichert Jhon Jairo Zuluaga Pelaez Miriam Fernanda Rodrigues Mirian Lago Valente Rosane Barbosa Lopes Cavalcante Paolo Reggiani Raghavan Srinivasan | 2021 | International Soil and Water Conservation Research2021，9，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员