scholarly journals PEMODELAN FLUKTUASI MUKA AIR TANAH UNTUK MENDUKUNG PENGELOLAAN AIR PADA PERTANIAN LAHAN RAWA PASANG SURUT TIPE A/B

2009 ◽  
Vol 10 (2) ◽  
pp. 92-101 ◽  
Author(s):  
Ngudiantoro ◽  
Hidayat Pawitan ◽  
Muhammad Ardiansyah ◽  
M Yanuar J. Purwanto ◽  
Settings Robiyanto H. Susanto
Keyword(s):  
Water Management ◽  
Plant Growth ◽  
Water Table ◽  
Standard Error ◽  
Agricultural Development ◽  
Pyrite Oxidation ◽  
High Sensitivity ◽  
Water Table Fluctuation ◽  
Lowland Area ◽  
Reclamation Area

The objectives of this research are to develop a model of water table fluctuation on tidal lowland area of A/B type. The results of the research are expected to support of the agricultural development on tidal lowland area, especially on water management, because the water management play an important role in the agricultural on tidal lowland area. The water table on tidal lowland area fluctuates according to space and time. The water table controls at a certain depth can support the plant growth and the pyrite oxidation restraint. The model of water table fluctuation which is developed in this research based on the ellipse concept. The research was conducted on the reclamation area of tidal lowland at the fourth tertiary block in P8-12S Delta Telang I, Banyuasin district, South Sumatra province. The simulations of model show good result of estimating the depth of water table on tidal lowland area of A/B type. The proportion of variation the depth of water table which can be explained by model that is 89,6% up to 95,5% with standard error of the estimate is 0,021-0,035 meters. The parameter of the water level in the tertiary canals has high sensitivity to the model.

scholarly journals Water Table Fluctuation in Tidal Lowland for Developing Agricultural Water Management Strategies

2010 ◽  
Vol 15 (3) ◽  
pp. 277-282 ◽  
Author(s):  
Momon Sodik Imanudin ◽  
Edi Armanto ◽  
Robiyanto Hendro Susanto ◽  
Siti Masreah Bernas
Keyword(s):  
Water Management ◽  
Water Table ◽  
Management Strategies ◽  
Agricultural Water ◽  
Agricultural Water Management ◽  
Water Table Fluctuation

scholarly journals Temporal and Local Heterogeneities of Water Table Depth under Different Agricultural Water Management Conditions

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2148
Author(s):  
Jonathan A. Lafond ◽  
Silvio J. Gumiere ◽  
Virginie Vanlandeghem ◽  
Jacques Gallichand ◽  
Alain N. Rousseau ◽  
...  
Keyword(s):  
Water Management ◽  
Water Table ◽  
Cropping Systems ◽  
Irrigation Management ◽  
Sprinkler Irrigation ◽  
Water Table Depth ◽  
Management Systems ◽  
Integrated Water Management ◽  
Growing Seasons ◽  
Good Drainage

Integrated water management has become a priority for cropping systems where subirrigation is possible. Compared to conventional sprinkler irrigation, the controlling water table can lead to a substantial increase in yield and water use efficiency with less pumping energy requirements. Knowing the spatiotemporal distribution of water table depth (WTD) and soil properties should help perform intelligent, integrated water management. Observation wells were installed in cranberry fields with different water management systems: Bottom, with good drainage and controlled WTD management; Surface, with good drainage and sprinkler irrigation management; Natural, without drainage, or with imperfectly drained and conventional sprinkler irrigation. During the 2017–2020 growing seasons, WTD was monitored on an hourly basis, while precipitation was measured at each site. Multi-frequential periodogram analysis revealed a dominant periodic component of 40 days each year in WTD fluctuations for the Bottom and Surface systems; for the Natural system, periodicity was heterogeneous and ranged from 2 to 6 weeks. Temporal cross correlations with precipitation show that for almost all the sites, there is a 3 to 9 h lag before WTD rises; one exception is a subirrigation site. These results indicate that automatic water table management based on continuously updated knowledge could contribute to integrated water management systems, by using precipitation-based models to predict WTD.

scholarly journals Groundwater recharge estimation in arid hardrock-alluvium aquifers using combined water-table fluctuation and groundwater balance approaches

2017 ◽  
Vol 31 (19) ◽  
pp. 3437-3451 ◽  
Author(s):  
Azizallah Izady ◽  
Osman A.E. Abdalla ◽  
Ata Joodavi ◽  
Akbar Karimi ◽  
Mingjie Chen ◽  
...  
Keyword(s):  
Groundwater Recharge ◽  
Water Table ◽  
Groundwater Balance ◽  
Water Table Fluctuation ◽  
Recharge Estimation

scholarly journals Wetland eco-engineering: measuring and modeling feedbacks of oxidation processes between plants and clay-rich material

2016 ◽  
Vol 13 (17) ◽  
pp. 4945-4957 ◽  
Author(s):  
Rémon Saaltink ◽  
Stefan C. Dekker ◽  
Jasper Griffioen ◽  
Martin J. Wassen
Keyword(s):  
Plant Growth ◽  
Feedback Loop ◽  
Pyrite Oxidation ◽  
Iron Toxicity ◽  
Biogeochemical Processes ◽  
Engineering Project ◽  
Feedback Mechanisms ◽  
Plant Soil ◽  
Water Composition ◽  
Rich Material

Abstract. Interest is growing in using soft sediment as a foundation in eco-engineering projects. Wetland construction in the Dutch lake Markermeer is an example: here, dredging some of the clay-rich lake-bed sediment and using it to construct wetland will soon begin. Natural processes will be utilized during and after construction to accelerate ecosystem development. Knowing that plants can eco-engineer their environment via positive or negative biogeochemical plant–soil feedbacks, we conducted a 6-month greenhouse experiment to identify the key biogeochemical processes in the mud when Phragmites australis is used as an eco-engineering species. We applied inverse biogeochemical modeling to link observed changes in pore water composition to biogeochemical processes. Two months after transplantation we observed reduced plant growth and shriveling and yellowing of foliage. The N : P ratios of the plant tissue were low, and these were affected not by hampered uptake of N but by enhanced uptake of P. Subsequent analyses revealed high Fe concentrations in the leaves and roots. Sulfate concentrations rose drastically in our experiment due to pyrite oxidation; as reduction of sulfate will decouple Fe-P in reducing conditions, we argue that plant-induced iron toxicity hampered plant growth, forming a negative feedback loop, while simultaneously there was a positive feedback loop, as iron toxicity promotes P mobilization as a result of reduced conditions through root death, thereby stimulating plant growth and regeneration. Given these two feedback mechanisms, we propose the use of Fe-tolerant species rather than species that thrive in N-limited conditions. The results presented in this study demonstrate the importance of studying the biogeochemical properties of the situated sediment and the feedback mechanisms between plant and soil prior to finalizing the design of the eco-engineering project.

scholarly journals Influence of Water Table Fluctuation on Natural Source Zone Depletion in Hydrocarbon Contaminated Subsurface Environments

2020 ◽  
Author(s):  
Reem Ismail ◽  
Saeid Shafieiyoun ◽  
Riyadh Al Raoush ◽  
Fereidoun Rezanezhad
Keyword(s):  
Water Table ◽  
Contaminated Soil ◽  
Soil Surface ◽  
Source Zone ◽  
Water Table Fluctuation ◽  
Mass Removal ◽  
Water Table Fluctuations ◽  
Water Conditions ◽  
Static Water ◽  
Influence Of Water

Most of the prediction theories regarding dissolution of organic contaminants in the subsurface systems have been proposed based on the static water conditions; and the influence of water fluctuations on mass removal requires further investigations. In this study, it was intended to investigate the effects of water table fluctuations on biogeochemical properties of the contaminated soil at the smear zone between the vadose zone and the groundwater table. An automated 60 cm soil column system was developed and connected to a hydrostatic equilibrium reservoir to impose the water regime by using a multi-channel pump. Four homogenized hydrocarbon contaminated soil columns were constructed and two of them were fully saturated and remained under static water conditions while another two columns were operated under water table fluctuations between the soil surface and 40 cm below it. The experiments were run for 150 days and relevant geochemical indicators as well as dissolved phase concentrations were analyzed at 30 and 50 cm below the soil surface in all columns. The results indicated significant difference in terms of biodegradation effectiveness between the smear zones exposed to static and water table fluctuation conditions. This presentation will provide an overview of the experimental approach, mass removal efficiency, and key findings.

scholarly journals Simulation of real-time variations of saline drainage water: comparing system dynamics with DRAINMOD-S

2021 ◽  
Author(s):  
Hamed Nozari ◽  
Abdolmajid Liaghat ◽  
Saeed Azadi ◽  
Azin Poursadri ◽  
Behzad Ghanbarian
Keyword(s):  
System Dynamics ◽  
Water Table ◽  
Drainage Water ◽  
Computer Simulation Model ◽  
Agricultural Water ◽  
Agricultural Water Management ◽  
Water Table Fluctuation ◽  
Wastewater Quality ◽  
Daily Water ◽  
Time Variations

Abstract Accurate simulations of wastewater quality and quantity, particularly in saline and semi-arid areas, are important in agricultural water management. In this study a system dynamics (SD) approach was proposed to simulate drainage water and groundwater salinities, water table fluctuation, and drainage discharge at field-scale. The results of the SD approach were compared with results from DRAINMOD-S, a computer simulation model. For model validation, earlier experimental data from two field units were used. The field units each contained three rows of piezometers. During irrigation, daily water table fluctuation, drainage discharge, irrigation and drainage water salinity, and the salinity in each piezometer, were measured. The SD approach simulated these parameters more accurately than DRAINMOD-S for both units.

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