scholarly journals Subsurface Water Distribution from Drip Irrigation Described by Moment Analyses

2007 ◽  
Vol 6 (1) ◽  
pp. 116-123 ◽  
Author(s):  
N. Lazarovitch ◽  
A. W. Warrick ◽  
A. Furman ◽  
J. Šimůnek
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Subsurface Water

scholarly journals Subsurface Water Distribution from Drip Irrigation Described by Moment Analyses

2007 ◽  
Vol 6 (1) ◽  
pp. 203-203
Author(s):  
N. Lazarovitch ◽  
A. W. Warrick ◽  
A. Furman ◽  
J. Šimůnek
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Subsurface Water

scholarly journals Effect of Pulse Drip Irrigation Duration on Water Distribution Uniformity

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2276
Author(s):  
David Lozano ◽  
Natividad Ruiz ◽  
Rafael Baeza ◽  
Juana I. Contreras ◽  
Pedro Gavilán
Keyword(s):  
Drip Irrigation ◽  
Water Distribution ◽  
Crop Yields ◽  
Irrigation System ◽  
Irrigation Schedule ◽  
Sandy Soils ◽  
Field Evaluation ◽  
Irrigation Performance ◽  
Standard Procedures ◽  
Distribution Uniformity

Developing an appropriate irrigation schedule is essential in order to save water while at the same time maintaining high crop yields. The standard procedures of the field evaluation of distribution uniformity do not take into account the effects of the filling and emptying phases of the irrigation system. We hypothesized that, in sloping sandy soils, when short drip irrigation pulses are applied it is important to take into account the total water applied from the beginning of irrigation until the emptying of the irrigation system. To compute distribution uniformity, we sought to characterize the filling, stable pressure, and emptying phases of a standard strawberry irrigation system. We found that the shorter the time of the irrigation pulse, the worse the distribution uniformity and the potential application efficiency or zero deficit are. This effect occurs because as the volume of water applied during filling and emptying phases increases, the values of the irrigation performance indicators decrease. Including filling and emptying phases as causes of non-uniformity has practical implications for the management of drip irrigation systems in sloping sandy soils.

ExoMars-2020 Landing Platform scientific payload

2020 ◽  
Author(s):  
Daniel Rodionov ◽  
Lev Zelenyi ◽  
Oleg Korablev ◽  
Ilya Chulkov ◽  
Konstantin Anufreychik ◽  
...  
Keyword(s):  
Water Distribution ◽  
Landing Site ◽  
Scientific Output ◽  
Atmospheric Composition ◽  
Radiation Environment ◽  
Subsurface Water ◽  
Joint Project ◽  
Landing Platform ◽  
Geophysical Investigations ◽  
Scientific Payload

<p>ExoMars is a joint project between ESA and Roscosmos to develop and launch two ExoMars missions - in 2016 and 2020. The first mission is currently in progress, studying Mars’ atmospheric composition in unprecedented details.</p><p>The second ExoMars mission is scheduled to be launched in Aug 2020 to target an ancient location at Oxia Planum interpreted to have strong potential for past habitability and for preserving physical and chemical biosignatures. The mission will deliver a Landing Platform with instruments for atmospheric and geophysical investigations and a Rover tasked with searching for signs of extinct life. The ExoMars rover will have the capability to drill to depths of 2 m to collect and analyze samples that have been shielded from the harsh conditions prevailing on the surface, where radiation and oxidants can destroy organic materials.</p><p>The Landing Platform is equipped with set of instruments (LPSP – Landing Platform Scientific Payload) to study the Martian environment at the landing site. After the Rover egress the Landing Platform will serve as long-lived stationary platform with expected lifetime of one Martian year.</p><p>LPSP consists of 13 instruments with total mass of 45 kg. LPSP is being developed by Space Research Institute of RAS (Moscow, Russia) with contribution from Belgium, Sweden, Spain, Finland, Czech Republic, France and Italy. LPSP will have strong synergies with other parts of ExoMars mission, thus extending the scientific output of whole project.</p><p>The main objectives of LPSP are:</p><ul><li>Context imaging</li> <li>Long-term climate monitoring and atmospheric investigations.</li> <li>Studies of subsurface water distribution at the landing site.</li> <li>Atmosphere/surface volatile exchange.</li> <li>Monitoring of the radiation environment.</li> <li>Geophysical investigations of Mars’ internal structure</li> </ul><p>LPSP Flight Models have been delivered and integrated on board of ExoMars 2020 descent module in TAS-F (Cannes, France).</p>

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