scholarly journals USO DA ÁGUA DE IRRIGAÇÃO E GESTÃO DE RECURSOS HÍDRICOS NA MICROBACIA DO RIBEIRÃO DOS MARINS NO MUNICÍPIO DE PIRACICABA/SP.

Irriga ◽  
2007 ◽  
Vol 12 (4) ◽  
pp. 456-470 ◽  
Author(s):  
Célia Regina Ferrari Faganello ◽  
Marcus Vinícius Folegatti ◽  
Roberta Alessandra Brusche Gonçalves ◽  
Ariovaldo Antônio Tadeu Lucas
Keyword(s):  
Water Use ◽  
Water Scarcity ◽  
Riparian Vegetation ◽  
Irrigation Management ◽  
Erosion Control ◽  
Sao Paulo ◽  
Irrigated Agriculture ◽  
São Paulo ◽  
Agricultural Producers ◽  
Small Catchments

USO DA ÁGUA DE IRRIGAÇÃO E GESTÃO DE RECURSOS HÍDRICOS NA MICROBACIA DO RIBEIRÃO DOS MARINS NO MUNICÍPIO DE PIRACICABA/SP.  Célia Regina Ferrari Faganello; Marcos Vinícius Folegatti; Roberta Alessandra Brusche Gonçalves; Ariovaldo Antônio Tadeu LucasDepartamento de Engenharia Rural, Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, SP, [email protected]  1 RESUMO             A percepção da sociedade de que a agricultura é o setor com maior demanda de água leva à necessidade de se praticar o manejo sustentável da irrigação. Os objetivos deste trabalho foram: i) avaliar a percepção de produtores rurais em relação à cobrança pelo uso da água, à escassez de água, à preservação da mata ciliar e ao controle da erosão, em propriedades produtoras de hortaliças na microbacia do ribeirão dos Marins, Piracicaba/São Paulo e fornecer subsídios para futuras intervenções de educação ambiental. Foram aplicados aos irrigantes roteiros quali-quantitativos de entrevista semi-estruturada. Os resultados mostraram que os produtores não praticam o manejo da irrigação; a maioria possui receio que falte água e também não concorda com a cobrança; apenas 4 fazem controle da erosão e todos acham importante preservar a mata ciliar. Conclui-se que é necessário capacitar os agricultores para usar racionalmente a água, possibilitar o acesso à tecnologias eficientes de irrigação e esclarecer a proposta de cobrança pelo uso da água. UNITERMOS: manejo da irrigação, escassez de água, cobrança pelo uso da água.  FAGANELLO, C. R. F.; FOLEGATTI, M. V.; GONÇALVES, R. AL. B.; LUCAS, A. A. T. IRRIGATON WATER USE AND WATER RESOURCE  MANAGEMENT IN MARINS SMALL CATCHMENTS, PIRACICABA/SP  2 ABSTRACT             Due to the society’s perception that agriculture is a sector with bigger water demand, sustainable irrigation management is necessary. The objectives of this work were to evaluate the perception of agricultural producers about charging for water use, water scarcity, preservation of the riparian vegetation and erosion control in rural properties along  Marins small catchments,Piracicaba,São Paulo and to provide information about  these small catchments for future  interventions in environmental education projects. Quali-quantitative, half-structuralized questionnaires were used to interview farmers. The results showed that producers do not manage irrigation, most are afraid of water lack and do not  agree with charging for water use; only 4 make erosion control and all of them think it is important to preserve riparian vegetation.  It can be concluded that it is necessary to qualify agricultural producers to use water rationally, making it possible to access efficient irrigation technologies and to clear out the aim  the charging for water use. KEYWORDS: irrigated agriculture handling, water scarcity, charging for water use

scholarly journals CENÁRIO DA ÁREA IRRIGADA POR PIVÔ CENTRAL NO TRIANGULO MINEIRO, NO ESTADO DE MINAS GERAIS, BRASIL

Nativa ◽  
2018 ◽  
Vol 6 (6) ◽  
pp. 613 ◽  
Author(s):  
Daniel Soares Ferreira ◽  
Wilian Rodrigues Ribeiro ◽  
Morgana Scaramussa Gonçalves ◽  
Andre Alves Pinheiro ◽  
Ramon Amaro Sales ◽  
...  
Keyword(s):  
Water Resources ◽  
Satellite Images ◽  
Irrigation System ◽  
Knowledge Bases ◽  
Minas Gerais ◽  
Sao Paulo ◽  
Irrigated Agriculture ◽  
São Paulo ◽  
Irrigated Area ◽  
System Water

A agricultura irrigada no Brasil cresceu mais de 40% nos últimos 20 anos, representando uma área de 4,4 milhões de ha, com a região Sudeste representando 47% deste total. O método de irrigação por pivô é o que mais cresce, com os estados de Minas Gerais, Goiás, Bahia e São Paulo concentrando cerca de 80% da área ocupada pela tecnologia. Neste cenário, a atualização das informações torna-se fundamentais pois criarão bases de conhecimento que irão ajudar estabelecer diretrizes para adoção e planejamento de políticas públicas que venham a contribuir para o uso estratégico dos recursos hídricos. Foi realizado fotointerpretação na escala de 1:1000, em imagens satélite da plataforma Google EarthTM Pro, para identificação do equipamento e obtenção de sua área de ocupação. Com os dados coletados realizou-se análises em função dos municípios, microrregiões e bacias hidrográficas. Atualmente, estima-se uma área irrigada de 134.741,11 hectares e 2.301 pivôs centrais. Os municípios de Rio Paranaíba (302), Perdizes (164), Santa Juliana (135), Uberaba (120) e Patos de Minas (111) destacam-se em maior número de equipamentos. A Microrregião de Araxá abrange a maior concentração de pivôs, 694, com 40.728,94 hectares irrigados. Na Bacia do Rio Paranaíba concentra-se 85,75% dos pivôs.Palavras-chave: sensoriamento remoto, sistema de irrigação, recursos hídricos. SCENARIO OF THE AREA IRRIGATED BY CENTRAL PIVOT IN THE TRIÂNGULOMINEIRO, IN THE STATE OF MINAS GERAIS, BRAZIL ABSTRACT: Irrigated agriculture in Brazil has grown over 40% in the last 20 years, representing an area of 4.4 million ha, with the Southeast region representing 47% of this total. The pivot irrigation method is the fastest growing, with the states of Minas Gerais, Goiás, Bahia and São Paulo concentrating around 80% of the area occupied by technology. In this scenario, updating the information becomes fundamental because it will create knowledge bases that will help establish guidelines for the adoption and planning of public policies that will contribute to the strategic use of water resources. It was realized photointerpretation in scale of 1: 1000, in satellite images of the platform Google EarthTM Pro, for identification of the equipment and obtaining of its area of occupation. With the data collected, analyzes were performed according to the municipalities, microregions and river basins. Currently, an irrigated area of 134,741.11 hectares and 2,301 central pivots is estimated. The municipalities of Rio Paranaíba (302), Perdizes (164), Santa Juliana (135), Uberaba (120) and Patos de Minas (111) stand out in more equipment. The Araxá Microregion encompasses the highest concentration of pivots, 694, with 40,728.94 irrigated hectares. In the Paranaíba River Basin, 85.75% of the pivots are concentrated.Keywords: remote sensing, irrigation system, water resources.

scholarly journals Opportunities for saving and reallocating agricultural water to alleviate water scarcity

Water Policy ◽  
2017 ◽  
Vol 19 (5) ◽  
pp. 886-907 ◽  
Author(s):  
Brian D. Richter ◽  
James D. Brown ◽  
Rachel DiBenedetto ◽  
Adrianna Gorsky ◽  
Emily Keenan ◽  
...  
Keyword(s):  
Water Use ◽  
Water Scarcity ◽  
Water Saving ◽  
Internet Survey ◽  
Irrigated Agriculture ◽  
Irrigation Systems ◽  
Water Savings ◽  
Consumptive Water Use ◽  
Water Scarce ◽  
Consumptive Water

As water scarcity worsens globally, there is growing interest in finding ways to reduce water consumption, and for reallocating water savings to other uses including environmental restoration. Because irrigated agriculture is responsible for more than 90% of all consumptive water use in water-scarce regions, much attention is being focused on opportunities to save water on irrigated farms. At the same time, many recent journal articles have expressed concern that claims of water-saving potential in irrigation systems lack technical credibility, or are at least exaggerated, due to failures to properly account for key elements of water budgets such as return flows. Critics have also asserted that opportunities for reallocating irrigation savings to other uses are limited because any freed-up water is taken up by other farmers. A comprehensive literature and internet survey was undertaken to identify well-documented studies of water-saving strategies in irrigated agriculture, as well as a review of case studies in which water savings have been successfully transferred to other uses. Our findings suggest that there is in fact considerable potential to reduce consumptive water use in irrigation systems when proper consideration is given to water budget accounting, and those savings can be beneficially reallocated to other purposes.

scholarly journals Performance of methods for estimation of table beet water requirement in Alagoas

2018 ◽  
Vol 22 (3) ◽  
pp. 189-193 ◽  
Author(s):  
Daniella P. dos Santos ◽  
Célia S. dos Santos ◽  
Leiliane M. da Silva ◽  
Márcio A. L. dos Santos ◽  
Cícero G. dos Santos
Keyword(s):  
Water Use ◽  
Standard Method ◽  
Water Scarcity ◽  
Performance Index ◽  
Reference Evapotranspiration ◽  
Irrigation Management ◽  
Crop Evapotranspiration ◽  
Abstract Optimization ◽  
Crop Coefficients ◽  
Drainage Lysimeter

ABSTRACT Optimization of water use in agriculture is fundamental, particularly in regions where water scarcity is intense, requiring the adoption of technologies that promote increased irrigation efficiency. The objective of this study was to evaluate evapotranspiration models and to estimate the crop coefficients of beet grown in a drainage lysimeter in the Agreste region of Alagoas. The experiment was conducted at the Campus of the Federal University of Alagoas - UFAL, in the municipality of Arapiraca, AL, between March and April 2014. Crop evapotranspiration (ETc) was estimated in drainage lysimeters and reference evapotranspiration (ETo) by Penman-Monteith-FAO 56 and Hargreaves-Samani methods. The Hargreaves-Samani method presented a good performance index for ETo estimation compared with the Penman-Monteith-FAO method, indicating that it is adequate for the study area. Beet ETc showed a cumulative demand of 202.11 mm for a cumulative reference evapotranspiration of 152.00 mm. Kc values determined using the Penman-Monteith-FAO 56 and Hargreaves-Samani methods were overestimated, in comparison to the Kc values of the FAO-56 standard method. With the obtained results, it is possible to correct the equations of the methods for the region, allowing for adequate irrigation management.

scholarly journals SISTEMA WEB DE MANEJO DA IRRIGAÇÃO – SISMI

Irriga ◽  
2015 ◽  
Vol 1 (2) ◽  
pp. 121-136
Author(s):  
Eduardo De Pieri Prando ◽  
Luis Sergio Vanzela ◽  
Karla Nascimento Sena ◽  
Guilherme Morais
Keyword(s):  
Low Income ◽  
Balance Control ◽  
Irrigation System ◽  
Low Cost ◽  
Irrigation Management ◽  
Sprinkler Irrigation ◽  
Sao Paulo ◽  
São Paulo ◽  
Climate Data ◽  
Temperature And Precipitation

SISTEMA WEB DE MANEJO DA IRRIGAÇÃO – SISMI EDUARDO DE PIERI PRANDO[1]; LUIZ SERGIO VANZELA2; KARLA NASCIMENTO SENA3 E GUILHERME MORAIS4 [1]Mestre, Professor Instituto Federal de Educação Ciência e Tecnologia de São Paulo - IFSP, Votuporanga/SP, Email: [email protected] Doutor, Universidade Camilo Castelo Branco - UNICASTELO, Fernandópolis/SP, Email: [email protected] Mestranda, Universidade Estadual Paulista "Julio de Mesquita Filho" Ilha Solteira/SP, Email: [email protected] Mestre, Professor Instituto Federal de Educação Ciência e Tecnologia de São Paulo - IFSP, Votuporanga/SP, Email: [email protected].  1 RESUMO Como os atuais métodos de manejo da irrigação são de difícil aplicação e custo relativamente elevado para irrigantes de baixa renda, este trabalho teve como objetivo o desenvolvimento de um aplicativo de baixo custo denominado SISMI (Sistema Web de Manejo da Irrigação), para o controle da água pelo manejo da irrigação.A plataforma foi desenvolvidautilizando a IDE NetBeans com o módulo da linguagem PHP, adaptada para computadores e celulares.O aplicativo SISMI indica o momentoe calcula o tempo de irrigação de acordo com uma adaptação da metodologia do balanço hídrico para o controle da irrigação, tanto para sistemas de irrigação por aspersão quanto para localizada. Para isso, são utilizados dados do clima (temperatura máxima e mínima, e precipitação), dados do tipo de solo da área (textura ou capacidade média de água disponível), dados da planta (espécie, fase de desenvolvimento, fator de disponibilidade de água no solo e profundidade efetiva do sistema radicular) e do sistema de irrigação (método de irrigação, eficiência de aplicação, vazão do emissor e espaçamento). O aplicativo (disponível em http://www.sismmi.com.br/), proporciona aos usuários uma ferramenta capaz de auxiliá-los no controle da aplicação de água pelo manejo da irrigação via atmosfera, de forma simples, de baixo custo e confiável, com aumento da eficiência do uso da água e energia na irrigação. Palavras-chave: recursos hídricos,evapotranspiração, irrigação por aspersão, irrigação localizada. PRANDOE. P.; VANZELAL. S.; SENA K. N.; MORAIS G.SYSTEM WEB FOR MANAGEMENT OF IRRIGATION - SISMI  2 ABSTRACT As the current water management methods are difficult to apply and relatively high cost for low-income irrigators, this study aimed to develop a low cost single application SISMI (Web Management System of Irrigation), for control water for irrigation management. The platform was developed using NetBeans IDE with the module of the PHP language, adapted to computers and mobile phones. The application SISMI indicates the time, and calculates the time of irrigation according to an adaptation of the method of water balance control for irrigation, both irrigation sprinkler systems and for localized. For this, climate data are used (maximum and minimum temperature and precipitation), soil type data area (texture or medium capacity available water), plant data (type, developmental stage, water availability factor in soil and effective depth of the root system) and irrigation system (irrigation method, application efficiency, emitter flow and spacing). The application (available in http://www.sismmi.com.br/), provides users with a tool to assist them in controlling the application of water for irrigation management in the atmosphere, so simple, inexpensive and reliable, with increased efficiency of water use and energy in irrigation. Keywords: drip irrigation, evapotranspiration, sprinkler irrigation, water resources.

scholarly journals Optimized Regulated Deficit Irrigation Management for Watermelon Cultivation in a Semiarid Region

2021 ◽  
Vol 9 (2) ◽  
pp. 113
Author(s):  
Kelly Nascimento Leite ◽  
Daniel Fonseca de Carvalho ◽  
Jose Maria Tarjuelo Martin- Benito ◽  
Geocleber Gomes de Sousa ◽  
Alfonso Dominguez Padilla
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Scarcity ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Control Treatment ◽  
Water Volume ◽  
Semiarid Region ◽  
Regulated Deficit Irrigation ◽  
Use Efficiency

The present study aimed to validate the MOPECO crop simulation model and to determine a viable irrigation management for watermelon in the semiarid region of Northeast Brazil, using methodologies of optimized regulated deficit irrigation (ORDI) and constant deficit irrigation (CDI). The experiment was carried out during October to December 2013 and the second one from July to August 2014 in plots of land of producers in the Baixo Acaraú Irrigated Perimeter – Ceará, Brazil. Treatments were characterized by ORDI management (70, 80, 90% ETa/ETm ratio) and CDI management along the entire cycle (70, 80 and 90% ETm) and control treatment, irrigated with 100% of the water requirement of the crop (ETm). In terms of saving of water resources, the results showed that management with regulated deficit irrigation leads to favorable and economically viable results for the farmer, of water saving, especially in a situation of severe water scarcity, irrigation management with regulated water deficit (ORDI) can provide favorable and economically viable results for the farmer. The highest value of WUE (41.8 kg m-3) was obtained with the treatment of lowest water volume applied (352.1 L) in the second experiment, decreasing with the increase in the water volume used. The ORDI methodology represents a better water use efficiency for all treatments of deficit applied compared to CDI treatments. The difference of ORDI and CDI methodology provided an increase of up to 200% in the gross margin obtained with the exploration of the watermelon culture which represents a range of R$ 986.00 in profit in a situation of water scarcity, as in the case of the studied region, the strategy with water supply of 70% of ETa/ETm ratio regulated by phenological stage was recommended in order to obtain highest water use efficiency.

scholarly journals Groundwater-Based Irrigation in the US – Challenges and Progress

2021 ◽  
Author(s):  
Blessing Masasi
Keyword(s):  
Water Use ◽  
Crop Yields ◽  
Groundwater Resources ◽  
Irrigation Management ◽  
Management Strategies ◽  
Wastewater Reuse ◽  
The United States ◽  
Irrigated Agriculture ◽  
The Us ◽  
Agricultural Regions

Even though groundwater-based irrigation has increased agricultural productivity and economic activity in the United States (US), the current rate of groundwater withdrawals from major aquifers could significantly affect the sustainability of agricultural production systems in the near future. In the major agricultural regions, producers are now facing challenges to irrigate to meet full crop water needs. There is an increasing need to strategize irrigation management under various climatic and environmental conditions to optimize water use in agriculture while optimizing crop yields. This study reviews some of the major challenges facing irrigated agriculture in the US and the potential measures to ensure the sustainability of groundwater-based irrigation. Identified challenges included diminishing quantity and quality of groundwater resources, frequent droughts, low adoption rates of precision irrigation technologies, and rising energy requirements for irrigation abstractions. Irrigation efficiency improvements, shifting to high water use efficiency crops, wastewater reuse, groundwater monitoring, availing incentives, and policy changes, were identified as promising water management strategies to ensure irrigation sustainability. The success of these strategies will depend on the uptake and adoption by the producers in the affected agricultural regions.

scholarly journals A satellite-based investigation into the algae bloom variability in large water supply urban reservoirs during COVID-19 lockdown

2021 ◽  
Author(s):  
Enner Alcantara ◽  
Keyla Coimbra ◽  
Igor Ogashawara ◽  
Thanan Rodrigues ◽  
Jose Mantovani ◽  
...  
Keyword(s):  
Water Supply ◽  
Water Use ◽  
Sao Paulo ◽  
Metropolitan Region ◽  
Treated Wastewater ◽  
Landsat 8 ◽  
São Paulo ◽  
Environmental Consequences ◽  
First Case ◽  
The Impact

Abstract Here we report the first case study of the significant algae blooming in large reservoirs in relation to the COVID-19 lockdown in Sao Paulo, Brazil. Chlorophyll-a (Chl-a) and phycocyanin (PC) concentrations were analyzed in the Guarapiranga and Billings reservoirs, which supply daily water use for over 20 million people and receives treated wastewater. We employed field-calibrated Sentinel 2 MSI and Landsat 8 OLI images to map the spatial patterns of Chl-aand PC over the two period: before (April, August and October 2019) and more than a month after the lockdown in Sao Paulo due to the rapid spread of the COVID-19 in Brazil (April 2020). We found a significant increase in algae blooming (both Chl-a and PC) in both reservoirs in April 2020, compared to the same month of 2019. We show that the episodic algae blooming is strongly related to the increased inflows of the residential wastewater from the surrounding watersheds, because the household water use has increased ~3.2% in April 2020, while the runoff into the reservoirs driven by the rainfall was much lower in 2020 compared to the previous year for the same month. In the case of Guarapiranga Reservoir, PC increased nearly 500% in April 2020 compared to April 2019. Given the importance of Billings and Guarapiranga reservoirs for the water supply of the Metropolitan Region of Sao Paulo (MRSP), the abrupt occurrence of cyanobacteria blooms related to the state’s lockdown should be considered a major concern for public and environmental health of the region. Although several environmental consequences have been reported due to the COVID-19 worldwide, this study is the first to report the impact of COVID-19 on the trophic state in the tropical reservoirs.

scholarly journals Innovation Issues in Water, Agriculture and Food

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1230 ◽  
Author(s):  
Maria do Rosário Cameira ◽  
Luís Santos Pereira
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Water Use ◽  
Water Scarcity ◽  
Water Productivity ◽  
Irrigation Scheduling ◽  
Irrigated Agriculture ◽  
Main Challenge ◽  
Agriculture And Food ◽  
The Impact

The main challenge faced by agriculture is to produce enough food for a continued increase in population, however in the context of ever-growing competition for water and land, climate change, droughts and anthropic water scarcity, and less-participatory water governance. Such a context implies innovative issues in agricultural water management and practices, at both the field and the system or the basin scales, mainly in irrigation to cope with water scarcity, environmental friendliness, and rural society welfare. Therefore, this special issue was set to present and discuss recent achievements in water, agriculture, and food nexus at different scales, thus to promote sustainable development of irrigated agriculture and to develop integrated approaches to water and food. Papers cover various domains including: (a) evapotranspiration and crop water use; (b) improving water management in irrigated agriculture, particularly irrigation scheduling; (c) adaptation of agricultural systems to enhance water use and water productivity to face water scarcity and climate change; (d) improving irrigation systems design and management adopting multi-criteria and risk approaches; (e) ensuring sustainable management for anthropic ecosystems favoring safe and high-quality food production, as well as the conservation of natural ecosystems; (f) assessing the impact of water scarcity and, mainly, droughts; (g) conservation of water quality resources, namely by preventing contamination with nitrates; (h) use of modern mapping technologies and remote sensing information; and (i) fostering a participative and inclusive governance of water for food security and population welfare.

Increasing profitability and water use efficiency of triple rice crop production in the Mekong Delta, Vietnam

2015 ◽  
Vol 154 (6) ◽  
pp. 1015-1025 ◽  
Author(s):  
P. P. NHẪN ◽  
L. V. HÒA ◽  
C. N. QUÍ ◽  
N. X. HUY ◽  
T. P. HỮU ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Level ◽  
Water Use ◽  
Water Scarcity ◽  
Irrigation Management ◽  
Ground Surface ◽  
Mekong Delta ◽  
Rice Production ◽  
Use Efficiency ◽  
Cropping Seasons

SUMMARYRice production in the Mekong Delta, Vietnam is threatened by future water scarcity caused by changing rainfall patterns and increasing irrigation costs. To improve resilience of the triple rice farming system to future climate-related stresses, profitability needs to be increased through water use efficiency, fertilizer management and planting methods.During four cropping seasons in 2011–13, alternate wetting and drying (AWD) irrigation was applied in the triple rice production area within An Giang Province, Vietnam. An issue with the application of AWD is the prevalence of acid sulphate soils in the Mekong Delta. Three types of irrigation management were tested; continuously flooded (CF) where the water in the paddy was maintained at 5 cm; AWD where the water level was allowed to fall to 15 cm below the ground surface, at which point the field was irrigated until the water level was at 1 cm above the ground surface (designated −15 cm); AWD where the water level was allowed to fall to 30 cm below the ground surface before irrigation until the water level was at 1 cm above the ground surface (designated −30 cm). Two further experiments were also undertaken which examined the planting method (transplant v. direct sowing) and phosphorus rate on rice yield. There was no effect on yield caused by P fertilizer rate and irrigation management in any year, and there was no significant effect on soil pH or salinity caused by irrigation management. Overall net profitability was greatest for the AWD treatments because of the reduction in pumping and labour costs in the dry season. Transplanted rice improved yields, but the labour cost reduced overall profitability. The study shows that AWD (−15 cm) can be safely applied in acid sulphate soil areas within the triple rice areas of An Giang Mekong Delta and saved at least 0·27 of total irrigated water quantity used during three of the six cropping seasons. The increased profitability of the AWD rice production system will help to improve the resilience of triple rice cropping systems to future water scarcity.

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