Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical Catchment
Land use and land cover in the Dano catchment is characterized by a rapid conversion from seminatural vegetation (fallow) to agriculture (cropland). The study compares both the saturated (Ks) and the unsaturated (Kh) hydraulic conductivities under cropland and fallow in the catchment to gain insight...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2019/2434512 |
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| author | Yacouba Yira Aymar Y. Bossa |
| author_facet | Yacouba Yira Aymar Y. Bossa |
| author_sort | Yacouba Yira |
| collection | DOAJ |
| description | Land use and land cover in the Dano catchment is characterized by a rapid conversion from seminatural vegetation (fallow) to agriculture (cropland). The study compares both the saturated (Ks) and the unsaturated (Kh) hydraulic conductivities under cropland and fallow in the catchment to gain insights into the effect of the current land use on soil water dynamics. Hydraulic conductivity was measured under forty-two (42) pairs of adjacent cropland-fallow plots using a Hood infiltrometer. Ks, Kh, bulk density, and soil texture were further compared using a paired two-tailed Student’s t-test (p=0.05). The results showed that both Ks and Kh are highly variable irrespective of the land use type (coefficient of variation > 100%). The results also showed that Ks was significantly higher (1.16-fold on average) under fallow compared to cropland. As for Kh, the results showed that, from −2 cm to zero tension heads (h), Kh under cropland and fallow is not significantly different; however, as the supplied tension decreases up to the saturation state, Kh under fallow becomes statistically higher compared to cropland. No significant difference was found between soil textures and bulk density under cropland and fallow meaning that the observed differences of Ks and Kh under cropland and fallow were caused by land use and not preexisting difference in texture. These results suggest an increasing risk of erosion, soil fertility reduction, and flood in the catchment because of agricultural land expansion. |
| format | Article |
| id | doaj-art-16ae922ac6c2468a9d506581485b5854 |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied and Environmental Soil Science |
| spelling | doaj-art-16ae922ac6c2468a9d506581485b58542025-02-03T06:12:39ZengWileyApplied and Environmental Soil Science1687-76671687-76752019-01-01201910.1155/2019/24345122434512Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical CatchmentYacouba Yira0Aymar Y. Bossa1Applied Science and Technology Research Institute–IRSAT/CNRST, P.O. Box 7047, Ouagadougou, Burkina FasoWest African Science Service Center on Climate Change and Adapted Land Use–WASCAL, P.O. Box 9507, Ouagadougou 06, Burkina FasoLand use and land cover in the Dano catchment is characterized by a rapid conversion from seminatural vegetation (fallow) to agriculture (cropland). The study compares both the saturated (Ks) and the unsaturated (Kh) hydraulic conductivities under cropland and fallow in the catchment to gain insights into the effect of the current land use on soil water dynamics. Hydraulic conductivity was measured under forty-two (42) pairs of adjacent cropland-fallow plots using a Hood infiltrometer. Ks, Kh, bulk density, and soil texture were further compared using a paired two-tailed Student’s t-test (p=0.05). The results showed that both Ks and Kh are highly variable irrespective of the land use type (coefficient of variation > 100%). The results also showed that Ks was significantly higher (1.16-fold on average) under fallow compared to cropland. As for Kh, the results showed that, from −2 cm to zero tension heads (h), Kh under cropland and fallow is not significantly different; however, as the supplied tension decreases up to the saturation state, Kh under fallow becomes statistically higher compared to cropland. No significant difference was found between soil textures and bulk density under cropland and fallow meaning that the observed differences of Ks and Kh under cropland and fallow were caused by land use and not preexisting difference in texture. These results suggest an increasing risk of erosion, soil fertility reduction, and flood in the catchment because of agricultural land expansion.http://dx.doi.org/10.1155/2019/2434512 |
| spellingShingle | Yacouba Yira Aymar Y. Bossa Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical Catchment Applied and Environmental Soil Science |
| title | Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical Catchment |
| title_full | Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical Catchment |
| title_fullStr | Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical Catchment |
| title_full_unstemmed | Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical Catchment |
| title_short | Agricultural Expansion-Induced Infiltration Rate Change in a West African Tropical Catchment |
| title_sort | agricultural expansion induced infiltration rate change in a west african tropical catchment |
| url | http://dx.doi.org/10.1155/2019/2434512 |
| work_keys_str_mv | AT yacoubayira agriculturalexpansioninducedinfiltrationratechangeinawestafricantropicalcatchment AT aymarybossa agriculturalexpansioninducedinfiltrationratechangeinawestafricantropicalcatchment |