Knowledge network development in water resources and irrigation management: the case of CKNet‐INA in Indonesia

2008 ◽  
Vol 57 (3) ◽  
pp. 341-353
Author(s):  
Carel Keuls
Keyword(s):  
Water Resources ◽  
Irrigation Management ◽  
Knowledge Network ◽  
Network Development

scholarly journals Energy-saving irrigation management

2018 ◽  
Vol 245 ◽  
pp. 06014 ◽  
Author(s):  
Sergey Andreev ◽  
Vladimir Zaginaylov ◽  
Andris Matveev
Keyword(s):  
Soil Moisture ◽  
Water Resources ◽  
Control Method ◽  
Strong Dependence ◽  
Irrigation Management ◽  
Vegetation Period ◽  
Weather Factors ◽  
Measuring Devices ◽  
Management Method

A significant part of the water resources used in agricultural production comes for irrigation. Due to the strong dependence of soil moisture on weather factors, the irrigation process must be carefully managed. To date, irrigation management is mainly carried out either as a function of soil moisture or according to a predetermined program. The article shows that both methods of management are imperfect since they can lead to a violation of agrotechnical requirements and waste of water. In order to improve the quality of irrigation and eliminate overspending of water resources, it was proposed to manage the water in a combined way. In this case, the formation of the control action occurs according to the results of the comparison of the controlled variable and disturbing influences with the reference values. The controlled value is the soil moisture, and as disturbing influences are considered the temperature and humidity of the air, atmospheric pressure, wind speed, precipitation. In addition, the proposed irrigation management method takes into account the forecast of the synoptic services on precipitation, their intensity and duration. To obtain information on the controlled value, as well as on disturbing influences, appropriate measuring devices are used, and information on the prediction of precipitation is delivered from a specialized server via the Internet. Before starting to use the control method, the agrotechnical requirements, the type, age and vegetation period of the plants are determined and set. The inclusion of irrigation equipment is carried out in accordance with the program and shut down - depending on the magnitude of the control signal.

IRRIGATION MANAGEMENT OF ORNAMENTAL SHRUBS UNDER LIMITED WATER RESOURCES

2014 ◽  
pp. 415-424 ◽  
Author(s):  
C. Cirillo ◽  
R. Caputo ◽  
G. Raimondi ◽  
S. De Pascale
Keyword(s):  
Water Resources ◽  
Irrigation Management ◽  
Ornamental Shrubs

Reality based scenarios facilitate knowledge network development

1995 ◽  
Vol 4 (1) ◽  
pp. 16-21 ◽  
Author(s):  
Judith Manning ◽  
Veronica Broughton ◽  
Edwina A. McConnell
Keyword(s):  
Knowledge Network ◽  
Network Development

scholarly journals Determination of Actual Evapotranspiration and Crop Coefficients of California Date Palms Using the Residual of Energy Balance Approach

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2253 ◽  
Author(s):  
Aliasghar Montazar ◽  
Robert Krueger ◽  
Dennis Corwin ◽  
Alireza Pourreza ◽  
Cayle Little ◽  
...  
Keyword(s):  
Energy Balance ◽  
Water Resources ◽  
Date Palm ◽  
Irrigation Management ◽  
Canopy Cover ◽  
Tree Height ◽  
Actual Evapotranspiration ◽  
Date Palms ◽  
The Mean ◽  
Crop Coefficients

As water scarcity becomes of greater concern in arid and semi-arid regions due to altered weather patterns, greater and more accurate knowledge regarding evapotranspiration of crops produced in these areas is of increased significance to better manage limited water resources. This study aimed at determining the actual evapotranspiration (ETa) and crop coefficients (Ka) in California date palms. The residual of energy balance method using a combination of surface renewal and eddy covariance techniques was applied to measure ETa in six commercial mature date palm orchards (8–22 years old) over one year. The experimental orchards represent various soil types and conditions, irrigation management practices, canopy characteristics, and the most common date cultivars in the region. The results demonstrated considerable variability in date palm consumptive water use, both spatially and temporally. The cumulative ETa (CETa) across the six sites ranged from 1299 to 1501 mm with a mean daily ETa of 7.2 mm day−1 in June–July and 1.0 mm day−1 in December at the site with the highest crop water consumption. The mean monthly Ka values varied between 0.63 (December) and 0.90 (June) in the non-salt-affected, sandy loam soil date palms with an average density of 120 plants ha−1 and an average canopy cover and tree height of more than 80% and 11.0 m, respectively. However, the values ranged from 0.62 to 0.75 in a silty clay loam saline-sodic date palm orchard with 55% canopy cover, density of 148 plants ha−1, and 7.3 m tree height. Inverse relationships were derived between the CETa and soil salinity (ECe) in the crop root zone; and between the mean annual Ka and ECe. This information addresses the immediate needs of date growers for irrigation management in the region and enables them to more efficiently utilize water and to achieve full economic gains in a sustainable manner, especially as water resources become less available or more expensive.

scholarly journals DAMPAK MODAL SOSIAL DALAM PENGELOLAAN IRIGASI TERHADAP KESEJAHTERAAN PETANI DI KABUPATEN SUKOHARJO JAWA TENGAH

2015 ◽  
Vol 24 (1) ◽  
pp. 67
Author(s):  
Sri Asih Rohmani
Keyword(s):  
Social Capital ◽  
Water Resources ◽  
Collective Action ◽  
Irrigation Management ◽  
Value System ◽  
Resource Sustainability ◽  
Cooperation Network ◽  
Effective Instrument ◽  
Community Area

Regulation in the utilization of irrigation as Common Pool Resources-CPRs is really needed to overcome water limitation. Conducive conditions for the irrigation management on overall hydrological unit will be strengthened by the presence of social capital. Social capital plays a role in the mechanism of collective action formation on the management of CPRs whose existence depends on the people’s social and cultural environment. Trust will reduce transaction costs and facilitate the formation of social cooperation (network). Establishment of social bonds and norms in the groups become an effective instrument for resource sustainability. The study aims to analyze the role of social capital in the irrigation management and its impact to the farmers welfare. The study was conducted from April to August 2014 In Sukoharjo,with 320 respondents who represent the hydrological diversity unit of 12 districts in Sukoharjo. Using the two levels regression analysis, namely at the micro-level (farmers household) and meso-level (community) to see the effect of different variables: social capital of farmer households (Iik), social capital of community (Mk), area access (R), access and availability of water resources (Hdr), external environment (E), the collective action of irrigation management (TK), farmers satisfaction (Stfy), highly significant effect to the farmer household welfare (Sik) and community level (wk). Social capital of community, area access, access and availability of water resources have a significant effect to the society welfare (Wk). Therefore, the implementation of irrigation management should provide space for the establishment of social capital accompanied by policies harmonization between the formal regulations and informal rules in the form of the value system and culture that flourished in the society life.

scholarly journals Water Use in the Irrigation Zone and Current Environmental Challenges

2013 ◽  
pp. 28-43
Author(s):  
Keyword(s):  
Water Resources ◽  
Water Use ◽  
Climate Changes ◽  
Global Climate ◽  
Irrigation Management ◽  
Arid Zones ◽  
Global Climate Changes ◽  
Irrigation Water Use ◽  
New Construction ◽  
Sustainable Irrigation

This article focuses on the problems of irrigation water use in the Kur – Araz lowland of the Azerbaijan Republic. Based on the analysis of the current condition of the irrigation management, it has been proposed the ways of its improvement, taking into account the peculiarities of arid zones of the country with consideration of the ongoing global climate changes and connected with the latter the necessity of optimization of water resources use and environmental protection of the irrigated areas. Importance of climate changes’ consideration in the process of reconstruction and new construction of waterwork facilities in order to ensure the condition for the sustainable irrigation systems operation, allowing improving water use efficiency through the rational use of the available water resources and achieving of the high cropyield has been substantiated.

scholarly journals MÉTODOS DE ESTIMATIVA DA EVAPOTRANSPIRAÇÃO DE REFERÊNCIA (ET0) NO MUNICÍPIO DE SANTA TERESA, ES

Irriga ◽  
2017 ◽  
Vol 22 (4) ◽  
pp. 701-714
Author(s):  
Andre Dalla Bernardina Garcia ◽  
José Carlos Mendonça ◽  
Claudio De Almeida Martins
Keyword(s):  
Water Resources ◽  
Solar Radiation ◽  
Reference Evapotranspiration ◽  
Irrigation Management ◽  
Absolute Error ◽  
Estimation Methods ◽  
Coefficient Of Determination ◽  
Espírito Santo ◽  
Espirito Santo ◽  
E Mail

MÉTODOS DE ESTIMATIVA DA EVAPOTRANSPIRAÇÃO DE REFERÊNCIA (ET0) NO MUNICÍPIO DE SANTA TERESA, ES  ANDRE DALLA BERNARDINA GARCIA1; JOSÉ CARLOS MENDONÇA2 E CLAUDIO MARTINS DE ALMEIDA3 1Instituto Federal do Espírito Santo, Rodovia ES 080, Km 93, São João de Petrópolis, CEP 29660-000, Santa Teresa, ES, Fone:(27)3259-7878, E-mail:[email protected]ório de Engenharia Agrícola/UENF, Av. Alberto Lamego, 2000,P1,sl 209, Horto, Campos dos Goytacazes, RJ, Fone (22) 2739-7308, E-mail: [email protected]ório de Engenharia Agrícola/UENF, Av. Alberto Lamego, 2000,P1,sl 209, Horto, Campos dos Goytacazes, RJ, Fone (22) 2739-7308, E-mail: [email protected]                                                                   1 RESUMO                                                                            Devido aos constantes debates ocorridos sobre a racionalização dos recursos hídricos, a busca de maneiras e boas práticas de utilização da água têm sido cada vez mais difundidas, principalmente na agricultura. Dentre os meios de preservar os recursos hídricos está o manejo de irrigação, por isso é muito importante realizar a estimativa da evapotranspiração de referência (ET0). Neste contexto, o presente trabalho foi desenvolvido para o município de Santa Teresa, localizado na meso região Central Espírito-Santense com o objetivo de avaliar e comparar diferentes métodos de estimativa da ET0 com o método de Penman-Monteith FAO56, considerado como padrão de calibração, na ausência de dados lisimétricos. Os métodos utilizados foram os de Hargreaves-Samani, Radiação Solar, Makkink, Jesen-Haise, Linacre e Penman Simplificado. O coeficiente de determinação (R2), índice de concordância de Willmott (D), o erro médio absoluto (MAE), o erro máximo (EMAX), a eficiência do método (EF) e o índice de desempenho (c) foram utilizados para avaliar os indicadores observados. Dentre os métodos avaliados, os que apresentaram melhores resultados foram os de Makkink e Penman Simplificado (R2 = 0,96 e 0,96; D= 0,99 e 0,97; MAE = 0,23 e 0,44; EMAX = 1,36 e 1,07; EF = 0,95 e 0,87 e c = 0,97 e 0,95) respectivamente, seguidos do método de Hargreaves-Samani (R2 = 0,86; D= 0,91; MAE = 0,60; EMAX = 2,16; EF = 0,69 e c = 0,85). Os resultados obtidos com os métodos de Linacre, Radiação Solar e Jensen-Haise foram inferiores e sendo a sua utilização não recomendada para a região de Santa Teresa, ES. Palavras-chave: Agrometeorologia, demanda hídrica, irrigação, Penman-Monteith  GARCIA, A. D. B.; MENDONÇA, J. C.; MARTINS, C. A.METHODS FOR ESTIMATING REFERENCE EVAPOTRANSPIRATION (ET0) FOR THE CITY OF SANTA TERESA, ES  2 ABSTRACT Due to constant discussion about rationalization of water resources, the search for ways and good practices in water use have been increasingly widespread, especially in agriculture. Among the means of preserving water resources is irrigation management, so it is very important to estimate the reference evapotranspiration (ET0). In this context, the present work was developed for the municipality of Santa Teresa, located in Central Espírito-Santo mesoregion with the objective of evaluating and comparing different ET0 estimation methods with Penman-Monteith FAO56 method considered as calibration standard, in the absence of lysimetric data. The methods used were those of Hargreaves-Samani, Solar Radiation, Makkink, Jesen-Haise, Linacre and Penman Simplified. The coefficient of determination (R2), Willmott concordance index (D), mean absolute error (MAE), maximum error (EMAX), method efficiency (EF) and performance index (c) were used for assessing the observed indicators. Among the evaluated methods, the ones with the best results were Makkink and Penman Simplified (R² = 0.96 and 0.96 D = 0.99 and 0.97, MAE = 0.23 and 0.44, EMAX = 1.36 and 1.07, EF = .95 and 0.87 and c = 0.97 and 0.95) respectively, followed by Hargreaves-Samani methods (R² = 0.86, D = 0.91, MAE = 0.60, EMAX = 2.16, EF = 0.69 and c = 0.85). The results obtained with the methods of Linacre, Solar Radiation and Jensen-Haise were lower and their use is not recommended for the region of Santa Teresa, ES. Keywords:  Agrometeorology, hydric demand, irrigation, Penman-Montheith 

scholarly journals Water and Irrigation Management in Arid and Semiarid Zones

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2446
Author(s):  
José Roldán-Cañas ◽  
María Fátima Moreno-Pérez
Keyword(s):  
Sustainable Development ◽  
Water Resources ◽  
Water Resources Management ◽  
Irrigation Management ◽  
Special Issue ◽  
Resources Management ◽  
Arid And Semiarid

As we wrote in the summary of this special issue, the purpose of this Special Issue is to report, in more detail, research of water resources management in the frame of sustainable development [...].

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