scholarly journals A New Drainpipe-Envelope Concept for Subsurface Drainage Systems in Irrigated Agriculture

2018 ◽  
Vol 67 ◽  
pp. 40-50 ◽  
Author(s):  
Idris Bahçeci ◽  
Abdullah Suat Nacar ◽  
Lui Topalhasan ◽  
Ali Fuat Tari ◽  
Henk P. Ritzema
Keyword(s):  
Subsurface Drainage ◽  
Irrigated Agriculture ◽  
Drainage Systems

Water Quality Benefits of "Shallow" Subsurface Drainage Systems

2006 ◽  
Author(s):  
Gary R. Sands ◽  
Inhong Song ◽  
Lowell M. Busman ◽  
Bradley Hansen
Keyword(s):  
Water Quality ◽  
Subsurface Drainage ◽  
Drainage Systems ◽  
Shallow Subsurface

scholarly journals THE PROBLEM OF “SALINE CONTAMINATION” OF NATURAL WATERS OF ROSTOV REGION, CONFINED TO THE IRRIGATED AREA

2021 ◽  
Author(s):  
T. I. Drovovozova ◽  
◽  
A. A. Kirilenko ◽  
Keyword(s):  
Natural Waters ◽  
Land Reclamation ◽  
Negative Impact ◽  
Water Bodies ◽  
Irrigated Agriculture ◽  
Drainage Systems ◽  
Small Water ◽  
Irrigation Period ◽  
Rostov Region ◽  
Maximum Permissible Concentrations

Purpose: analysis of problematic issues associated with the hydrochemistry of natural waters and the processes occurring in the irrigation systems of Rostov region. Discussion. The specificity of growing crops associated with irrigated agriculture has led to the formation of significant volumes of drainage and waste water (58676.5 thousand cub. m at the level of 2019). The quality of drainage wastewaters is determined by the hydrochemistry of groundwater and water intakes and has a seasonal character. In drainage systems operation of the Central irrigated zone, an unregulated inflow of salt-forming ions into water inlets was noted, and their concentration in the places where drainage wastes are discharged into small water bodies of the Lower Don (for example, Kostylevsky pr., Kolodezki ur., Solenaya river, erik Besheny) differs little from the background geochemical concentrations and corresponds to the natural saline background of the studied objects. Since irrigation and drainage systems are the objects of negative impact on the environment, uncontrolled natural processes of salt-forming ions migration in adjacent environments in combination with desalinization processes during the irrigation period led to violations of ecological legislation by the land reclamation and agricultural water supply departments in terms of exceeding the standards of maximum permissible concentrations for water bodies for fishery purposes, approved by the Order of the Ministry of Agriculture of 13.12.2016 no. 552. Conclusions. Regularities in formation of salt-forming ions migration processes in adjacent media have been revealed. It has been determined that one of the sources and agents of “saline contamination” of drainage and natural waters is groundwater. Hydrochemical materials and analysis of regulatory legal acts in terms of water bodies protection and use indicate the need to establish standards admitted to chemical substances concentrations disposal, taking into account the regional natural (nominally natural) hydrochemical background and natural and climatic characteristics differentiated for each small water body.

Coefficients for Quantifying Subsurface Drainage Rates

2017 ◽  
Vol 33 (6) ◽  
pp. 793-799 ◽  
Author(s):  
R. Wayne Skaggs
Keyword(s):  
Meta Analysis ◽  
Soil Surface ◽  
Subsurface Drainage ◽  
Rainfall Events ◽  
Drainage Systems ◽  
Hydraulic Roughness ◽  
Drainage Rate ◽  
Design Projects ◽  
Research And Design ◽  
Different Soils

Abstract. It is proposed that technical papers on drainage research studies and engineered design projects should report standard coefficients or parameters that characterize the hydraulics of the system. The following coefficients define key subsurface drainage rates that can be used to quantify and compare the hydraulics of drainage systems across sites, soils and geographic locations. (1) The steady subsurface drainage rate (cm/d) corresponding to a saturated profile with a ponded surface. This subsurface drainage rate defines the length of time that water remains ponded on the soil surface following large rainfall events. It is proposed that this rate be called the Kirkham Coefficient (KC) in honor of Professor Don Kirkham who derived analytical solutions for saturated drained profiles for most soil and boundary conditions of interest. (2) Drainage intensity (DI), which represents the drainage rate (cm/d) when the water table midway between parallel drains is coincident with the surface. The DI can be estimated by the Hooghoudt equation and is dependent on the effective saturated hydraulic conductivity of the profile, drain depth, spacing, and depth of the soil profile or restrictive layer. (3) The drainage coefficient (DC), which quantifies the hydraulic capacity of the system. This value is the rate (cm/d) that the outlet works can remove water from the site. It is dependent on the size, slope, and hydraulic roughness of the laterals, submains, mains, and, in cases where pumped outlets are used, the pumping capacity. Routine inclusion of these three coefficients in the documentation of research and design projects would facilitate comparison of results from different soils and drainage systems, and generally, the meta-analysis of data pertaining to drainage studies. Keywords: Drainage, Drainage intensity, Drainage coefficient, Drainage nomenclature, Kirkham Coefficient.

scholarly journals Effects of macro-pores on water flow in coastal subsurface drainage systems

2016 ◽  
Vol 87 ◽  
pp. 56-67 ◽  
Author(s):  
Pei Xin ◽  
Xiayang Yu ◽  
Chunhui Lu ◽  
Ling Li
Keyword(s):  
Water Flow ◽  
Subsurface Drainage ◽  
Drainage Systems

THE FEASIBILITY OF RICE HUSK APPLICATION AS ENVELOPE MATERIAL IN SUBSURFACE DRAINAGE SYSTEMS

2012 ◽  
Vol 61 (4) ◽  
pp. 490-496 ◽  
Author(s):  
Kami Kaboosi ◽  
Abdolmajid Liaghat ◽  
Seyed Hadi Hosseini
Keyword(s):  
Rice Husk ◽  
Subsurface Drainage ◽  
Drainage Systems ◽  
Envelope Material
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