%0 Journal Article %1 noauthororeditor2018spatial %A Abua, M. A %D 2018 %J Earth Sciences: an International Journal (ESIJ) %K earth science %N 1 %P 1-7 %T SPATIAL VARIABILITY OF SEDIMENT YIELD ON LAND USE COVER TYPES IN CALABAR RIVER BASIN CATCHMENT, CROSS RIVER STATE,NIGERIA %U http://airccse.com/esij/index.html %V 1 %X This study investigated the spatial variability of sediment loss from five land use types in the humid subtropical watershed region, characterized with high incidence of rainfall. Five contiguous experimental runoff plots were designed to represent the land use types: urban, farm, grass, bare and forest surfaces and a 2 inch pipe installed in the midway of the lower boundary of each plot/land use type (5.4m2 ) to a metal sedimentation box (31 by 23cm); arranged in a convex slope series on a foothill of 20% gradient slope oriented at the strike of the slope. Seven independent variables were examined simultaneously from each experimental plot/land use type. These include rainfall amount and intensity, particle-size characteristics, infiltration capacity, vegetation cover, slope length and gradient. The fieldwork was conducted between October, 2014 and December, 2015 to cover the two seasons and all rainfall events. A total of 65 rainy days capable of dislodging sediments were registered over the period of investigation. Equations of sediment loss for the individual stations were derived to develop a stochastic empirical model. Rainfall amount had the greatest relationship in the study and it was significant at the 99.9% probability level. Forest and grass surfaces with mean values of 5.66kg and 14.95kg of sediment loss respectively recorded significantly less than farm 33.50kg, bare 33.91kg and urban 28.78kg surfaces. To ameliorate hazards associated with sediment loss, the study recommends among others reforestation and establishment of forest reserves at designated areas of the basin. This will enhance sustainable watershed management in the humid tropical environment.

@article{noauthororeditor2018spatial, abstract = {This study investigated the spatial variability of sediment loss from five land use types in the humid subtropical watershed region, characterized with high incidence of rainfall. Five contiguous experimental runoff plots were designed to represent the land use types: urban, farm, grass, bare and forest surfaces and a 2 inch pipe installed in the midway of the lower boundary of each plot/land use type (5.4m2 ) to a metal sedimentation box (31 by 23cm); arranged in a convex slope series on a foothill of 20% gradient slope oriented at the strike of the slope. Seven independent variables were examined simultaneously from each experimental plot/land use type. These include rainfall amount and intensity, particle-size characteristics, infiltration capacity, vegetation cover, slope length and gradient. The fieldwork was conducted between October, 2014 and December, 2015 to cover the two seasons and all rainfall events. A total of 65 rainy days capable of dislodging sediments were registered over the period of investigation. Equations of sediment loss for the individual stations were derived to develop a stochastic empirical model. Rainfall amount had the greatest relationship in the study and it was significant at the 99.9% probability level. Forest and grass surfaces with mean values of 5.66kg and 14.95kg of sediment loss respectively recorded significantly less than farm 33.50kg, bare 33.91kg and urban 28.78kg surfaces. To ameliorate hazards associated with sediment loss, the study recommends among others reforestation and establishment of forest reserves at designated areas of the basin. This will enhance sustainable watershed management in the humid tropical environment. }, added-at = {2018-05-10T06:57:15.000+0200}, author = {Abua, M. A}, biburl = {https://www.bibsonomy.org/bibtex/2404323bd34686d4488334491709fc861/hadripriz}, interhash = {19249572891aedc975e127d04143e058}, intrahash = {404323bd34686d4488334491709fc861}, journal = {Earth Sciences: an International Journal (ESIJ)}, keywords = {earth science}, month = {April}, number = 1, pages = {1-7}, timestamp = {2018-05-10T06:57:15.000+0200}, title = {SPATIAL VARIABILITY OF SEDIMENT YIELD ON LAND USE COVER TYPES IN CALABAR RIVER BASIN CATCHMENT, CROSS RIVER STATE,NIGERIA}, url = {http://airccse.com/esij/index.html}, volume = 1, year = 2018 }