On-Farm Studies of Water Use and Water Quality for Rice Production

2006 ◽  
Author(s):  
E. D. Vories ◽  
P. L. Tacker ◽  
I. Chaubey ◽  
R. Lipsey ◽  
W. Smith ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Use ◽  
Rice Production ◽  
On Farm

On-Farm Watershed Study of Water Use and Water Quality for Rice Production

2007 ◽  
Author(s):  
Phil L Tacker ◽  
Wayne Smith ◽  
Rachel Lipsey
Keyword(s):  
Water Quality ◽  
Water Use ◽  
Rice Production ◽  
On Farm

scholarly journals Blending Satellite Data to Monitor Agricultural Water Use

Eos ◽  
2017 ◽  
Author(s):  
Terri Cook
Keyword(s):  
Water Quality ◽  
Water Use ◽  
Satellite Data ◽  
New Technique ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Improve Water Quality ◽  
A New Technique ◽  
Quality Assessments

A new technique that merges data gathered by multiple satellites can be used to monitor agricultural water use and improve water quality assessments around the globe.

scholarly journals Water Use Special Features under the Water Resources Scarcity Conditions (the Ishim River as a Study Case)

2015 ◽  
pp. 4-19
Author(s):  
Keyword(s):  
Water Quality ◽  
Water Resources ◽  
Water Use ◽  
Water Consumption ◽  
Anthropogenic Impact ◽  
General Trend ◽  
Volume Reduction ◽  
Transboundary Basin ◽  
Study Case ◽  
Water Quality Deterioration

Special features of water use within the boundaries of the Ishim River transboundary basin (an area with very scanty water resources) have been analyzed. In spite of the general trend of water consumption volume reduction the water quality deterioration has been found in the basin. The degree of anthropogenic impact upon water resources have been assessed on the basis of direct and indirect indicators.

scholarly journals Modelling of base flows by analysing the streamflow hydrograph

2012 ◽  
pp. 71-86
Author(s):  
Vesna Djukic ◽  
Vladislava Mihailovic
Keyword(s):  
Water Quality ◽  
Water Use ◽  
Local Minimum ◽  
Base Flow ◽  
Water Quality Protection ◽  
Small Streams ◽  
Aquifer Characteristics ◽  
Retention Characteristics ◽  
Increasing Demand ◽  
Base Flows

During dry periods, the flow of medium and small streams is significantly reduced and equal to groundwater flow. Since the base flows provide information about aquifer characteristics and retention characteristics of a basin, the possibilities of analysis and simulation of base flows gain importance under the conditions of intensive water use and the increasing demand for adequate water quality protection. In this paper, a model was established and used for the description of the principles governing the changes of base runoff on the basis of a streamflow hydrograph registered at the outlet of the basin on the example of the Kolubara basin up to the ?Valjevo? profile. Since the amount of base runoff from a basin cannot be measured, the results of base flows obtained using the local minimum method were adopted as the criterion for the comparison of the modelled values of base runoffs. The created model was applied for making simulations of the base runoff hydrograph during three characteristic years (rainy 1970, average 1985, and dry 1990). Deviations between the base flow values obtained using the established model and by applying the local minimum method are acceptable from the standpoint of general hydrological accuracy.

scholarly journals Trans-regional rice supply paradigm reveals unsustainable water use in China

Water Policy ◽  
2021 ◽  
Author(s):  
Liang Wu ◽  
Min Wang ◽  
Kirti Avishek
Keyword(s):  
Water Use ◽  
Northeast China ◽  
Southwest China ◽  
Water Security ◽  
Rice Production ◽  
Consumption Pattern ◽  
Sustainable Food ◽  
The Past ◽  
Production And Consumption ◽  
Global Population

Abstract Rice is an important staple food for more than half of the global population and one of the largest water consumers on earth. Improving the efficiency of water embedded in rice production and supply could have great implications for food and water security. This study starts from Yunnan, a traditional rice producing and consuming province in southwest China, and analyses its rice supply structure and dynamics, together with embedded water footprints (WFs) of three other regions: Northeast China, South and Southwest China and Southeast Asia. The results show that Yunnan has been under through drastic food change in the past decades, leading to increasing production and supply gap. Yunnan is found to have the least WF (778.2 m3/t) for rice production across the study regions, while Northeast China consumes the highest blue WF (364.6 m3/t) and blue to total WF ratio (97.7%). The study indicates that Northeast China is at risk of groundwater deficit due to rice production and export and the current rice production and consumption pattern is inefficient. The study suggests that policies for groundwater extraction, water resource price and international trade need to be in place to ensure sustainable food supply and water use at regional and national levels.

scholarly journals Pengaruh Pemberian Probiotik Berbeda dalam Sistem Akuaponik terhadap Laju Pertumbuhan dan Survival Rate Ikan Lele (Clarias sp.)

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Ayu Herdianti Primashita ◽  
Boedi Setya Rahardja ◽  
Prayogo .
Keyword(s):  
Water Quality ◽  
Growth Rate ◽  
Survival Rate ◽  
Specific Growth Rate ◽  
Water Use ◽  
Specific Growth ◽  
Final Conclusion ◽  
Randomized Design ◽  
Business Efficiency ◽  
Range Test

Catfish (Clarias sp.) is a freshwater fish that is widely cultivated because it is a leading commodity. Increased production of catfish resulted in extra area of cultivated land and water use. The technology suitable to be applied is aquaponic system. In addition to saving land and water use, Aquaponic is also improving business efficiency through the utilization of nutrients from food remains and fish metabolism. Water quality is an important factor for the success of cultivation. Maintenance catfish with the addition of probiotics in aquaponic system can be a solution for maintaining water quality, because it contains bacteria that can increase nitrite to nitrate changes that can be utilized for growth of plants and do not poison the fish. The purpose of this study was to determine the effect of different probiotics in the aquaponic system towards growth rate and survival rate of catfish. The method that used in this research is experimental with completely randomized design (four  treat and five repeated) are P0 (control), P1 (probiotic A), P2 (probiotic B) and P3 (probiotic C). Analysis of data processed using Analysis of Variance. If there are significant differences then continued Duncan's Multiple Range Test. The results showed that the giving of probiotics in the aquaponic system is significantly different (p <0.05). The final conclusion is that the addition of probiotics in  aquaponic system affect the growth rate and survival rate of catfish. The highest specific growth rate (0.025%/ day) and the highest survival rate (77.8%) contained in the P2 treatment. The lowest specific growth rate (0.019% /day) and the lowest survival rate (64.4%) contained in P0 treatment (control). Keywords : Aquaponic, Catfish, Probiotic, Growth Rate, Survival Rate, Clarias sp.

Sustainability of Rice Production at Baixo Mondego, Portugal

2022 ◽  
pp. 266-287
Author(s):  
Maria de Fátima Lorena Oliveira ◽  
Sergio Oliveira ◽  
António Terrão Russo ◽  
kiril bahcevandziev ◽  
Ana Bela M. Lopes ◽  
...  
Keyword(s):  
Water Quality ◽  
Production System ◽  
Water Demand ◽  
Irrigation System ◽  
Field Research ◽  
Field Trials ◽  
Rice Production ◽  
Wetting And Drying ◽  
Marketing Systems ◽  
Dry Soil

This chapter aims to analyze the rice production system at the Baixo Mondego Valley to understand the main concerns. Field research and field trials were carried out to analyze rice production, marketing systems, and different irrigation alternatives. An analysis on the worries was made, and a correlational attempt was done. The results show a production system oriented by agri-environmental policies. The problems related with rice irrigation are water scarcity, environmental impacts on water quality, agroecosystems, and methane emissions. To reduce water demand, the alternate wetting and drying flooding method, and the improvement of the precise land levelling were studied on the scope of MEDWATERICE Project. About 12-14% of water saving was observed, with impact on production lower than 3.5%, allowing period of 11-19 days of dry soil, expecting positive implications for greenhouse gas emissions. Innovation in the irrigation system may help to reduce some of the farmers' concerns and help to better adapt this crop to the new needs of agriculture in terms of environmental competitiveness.

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