Título:	The role of toposequence and underground drainage in variation of groundwater and salinity levels in irrigated areas.
Autor:	LIMA, L. da R. F. ALMEIDA, C. D. G. C. de MELO, G. R. de SILVA, M. M. da JIMENEZ, K. J. AMORIM, V. B. de SILVA, A. T. C. S. G. da DEON, M. D. I. BARBOSA, R. N. FERREIRA, JÚNIOR, J. F. OLIVEIRA, T. F. de SANTOS JÚNIOR, J. A.
Afiliación:	LAERCIA DA ROCHA FERNANDES LIMA, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; CERES DUARTE GUEDES CABRAL DE ALMEIDA, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; GABRIEL RIVAS DE MELO, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; MANASSÉS MESQUITA DA SILVA, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; KEILA JERONIMO JIMENEZ, UNIVERSIDAD PARA EL BIENESTAR BENITO JUÁREZ; VALDINEY BIZERRA DE AMORIM, SÃO FRANCISCO AND PARNAÍBA VALLEY DEVELOPMENT COMPANY; ANDREY THYAGO CARDOSO S. G. DA SILVA, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; MAGNUS DALL IGNA DEON, CPATSA; REBECA NEVES BARBOSA, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; JOSÉ FERNANDES FERREIRA JÚNIOR, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; TARCÍSIO FERREIRA DE OLIVEIRA, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO; JOSÉ AMILTON SANTOS JÚNIOR, FEDERAL RURAL UNIVERSITY OF PERNAMBUCO.
Año:	2026
Referencia:	Hydrology, v. 13, n. 3, 99, 2026.
Descripción:	In irrigated areas around the world, the recommendation for the use of subsurface drainage is also associated with controlling salinity problems. Due to the high implementation cost, the search for solutions that make this requirement more flexible is necessary. Among the options to be investigated is the hypothesis that the height and salinity of the water table in plots located at the highest points of a toposequence are lower and do not compromise plant development, even without underground drainage systems. In this context, the present work was developed to monitor and evaluate the variation in water level or mottling over twelve months, as well as to measure and analyze the electrical conductivity and average pH of the water table during this period and its possible impact on plants. For this purpose, three lots in toposequence were selected in the Senador Nilo Coelho Public Irrigation Project, Petrolina—PE, with previously defined characteristics: soil classification (Plinthic irrigation were monitored by an automatic weather station and hydrometers in each lot. In each plot, nine observation wells were installed, distributed in a grid, with the aim of make monthly measurements of the water table level or mottling. The electrical conductivity and pH of the groundwater were also measured to obtain the average monthly value for each lot. Illustrative 3D maps of the water table level in relation to the ground surface were created using the simple kriging method, in the UTM SIRGAS 2000 24S projection system. The absence and presence of groundwater in the upper and lower hillslope lots, respectively, were favored by the toposequence. The decision to install underground drainage or not can be made on a case-by-case basis; this must take into account, among other aspects, changes in physical characteristics along the soil profile, possible occurrence of mottling, the quality of water for irrigation, the irrigation management adopted and the position of the lot in the toposequence.
Thesagro:	Irrigação Microaspersão Drenagem Subterrânea Qualidade da Água Salinidade
NAL Thesaurus:	Soil salts Soil Groundwater Irrigation management Irrigation Irrigation and drainage
Palabras clave:	Balanço de sais no solo Sustentabilidade Semiárido Encosta Água subterranea Area irrigada
DOI:	https://doi.org/10.3390/hydrology13030099
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CPATSA)