Qualidade De Águas De Poços Dos Assentamentos Da Chapada Do Apodi-Rn Para O Uso Na Agricultura

Abstract

ANALYSIS OF WELL WATER QUALITY FROM RURAL SETTLEMENT OF THE APODI-RN PLATEAU FOR USE IN AGRICULTURE ABSTRACTThe agriculture is the main source of income for rural communities, especially in the settlements located in the state of Rio Grande do Norte, necessitating the use of water to ensure the proper development of crops. The study aims to analyze the well water of settlements of the Apodi Plateau, classifying them as to its use in irrigation. Samples were collected from wells of 11 settlements for physical and chemical analysis in order to rank as the criteria for water quality according to the UCCC and Richard. It was observed that all wells showed some restraint for use in irrigation and the well 3 being that one who presented the greatest risk of soil salinity and sodicity. The wells 1, 8, 14 and 17 had a lower degree of restriction in accordance with the UCCC, while the wells 16, 18 and 19 had the lowest risk of salinity and sodicity by the methodology of Richards.

Groundwater quality monitoring for agriculture irrigated in Catol Do Rocha, Paraba State, Brazil

“…These orders differ from those obtained for the concentrations (Figure 2) because they are calculated based on the concentration in mg L -1 and vary according to the equivalent each species weight (Cavalcante et al, 2012). This situation resembles the sequences presented by Silva Júnior et al (1999), Costa (1982), Medeiros et al (2003), Andrade Júnior et al (2006), Leal et al (2009), Barroso et al (2011), Oliveira et al (2013) and Holanda et al (2016), respectively for crystalline Brazilian Northeast waters in the Paraíba, Piauí, Rio Grande do Norte and Ceará, States all of which are inserted in Brazil semi-arid region.…”

“…Agriculture, in Brazil and worldwide, is the activity that consumes the most water in comparison to the consumption of human, herds and industrial (Oliveira et al, 2013;Holanda et al, 2016). This peculiarity, in part, is due to insufficient and irregular rainfall, high temperature air and soil, low humidity, high evaporation rates and evapotranspiration.…”

“…The use of water with restrictions due to excess salts in irrigated agriculture, irrespective of the source (surface or underground source), requires the monitoring of the electrical conductivity, cation and dissolved concentrations (Medeiros et al, 2003;Barroso et al, 2011;Jang et al, 2012;Oliveira et al, 2013;Lira et al, 2015;Chu et al, 2016;Rassol et al, 2017;Ganiyu et al, 2018). This monitoring, if possible, should be at various times of the year, considering one or more sources of property, municipality or watershed, making possible a specific panorama and the elaboration of strategies of use of this water resource.…”

Influence of sewage disposal on the water quality of the Sucuru River alluvial aquifer in the municipality of Sumé-PB, Brazil

“…This evaluation clearly demonstrates the predominance of high to very high risk for the alluvium, and only in the point P02 the risk is considered as extremely high (Figure 6). Consequently, the utilization of these waters is conditioned on the cultivation of salt-tolerant species with a good absorption of these salts, in order to reduce the risks of soil salinization and sodification Oliveira et al (2013) also found high salt levels in the waters from the wells of the settlement of the Apodi Plateau-RN, characterized as a semi-arid region.…”

Classificação Das Águas De Estação De Dessalinização De Acordo Com O Índice Relativo De Qualidade De Água Para Irrigação

“…Esta classe contém 27,38% do total de amostras sendo 25% das amostras de água salobras de poços e 57,14% das amostras água de rejeito. Contidas neste grupo estão as águas de qualidade mais inferior uma vez que este é o grupo que mais se distancia do valor ideal do IRQI que é zero, podendo ser utilizadas em condições extremamente específicas de uso, como cultivo hidropônico por exemplo, uma vez que estas águas apresentam elevada salinidade o que aumenta seu potencial osmótico e dificulta a absorção de água pelas culturas além de depositar elevada quantidade de sais no solo.Considerando a classificação proposta por Richards (1954), Oliveira e Maia (1998), a partir da análise de 625 amostras de água de diversos aquíferos do Rio Grande do Norte,IV INOVAGRI International Meeting, 2017 mostrou que a maior incidência com problemas de salinidade, expressa pela sua alta condutividade elétrica e sodicidade, ocorreu nas amostras provenientes dos poços que exploram os recursos do calcário Jandaíra ou dos aquíferos abastecidos diretamente pelo lençol freático Oliveira et al (2013). estudando a qualidade das águas de 18 poços em assentamentos da chapada do Apodi, usaram a mesma classificação e verificaram que todos os poços apresentaram alguma restrição para o uso na irrigação.…”