Salt Leaching Efficiency of Subsurface Drainage Systems at Presence of Diffusing Saline Water Table Boundary: A Case Study in Khuzestan Plains, Iran

2010 ◽  
Author(s):  
Ebrahim Pazira ◽  
Mehdi Homaee
Keyword(s):  
Water Table ◽  
Saline Water ◽  
Subsurface Drainage ◽  
Drainage Systems ◽  
Salt Leaching ◽  
Leaching Efficiency

A component of the FAO normative programme on land drainage: Mexico case study on the evaluation of the performance of subsurface drainage systems

2007 ◽  
Vol 56 (S1) ◽  
pp. S179-S190 ◽  
Author(s):  
Julián Martínez-Beltrán ◽  
Arturo González-Casillas ◽  
Rodolfo Namuche-Vargas
Keyword(s):  
Subsurface Drainage ◽  
Drainage Systems ◽  
Land Drainage

scholarly journals A Case Study of a Large Unstable Mass Stabilization: “El Portalet” Pass at the Central Spanish Pyrenees

2021 ◽  
Vol 11 (16) ◽  
pp. 7176
Author(s):  
Guillermo Cobos ◽  
Miguel Ángel Eguibar ◽  
Francisco Javier Torrijo ◽  
Julio Garzón-Roca
Keyword(s):  
Water Table ◽  
Critical Factor ◽  
Slope Stabilization ◽  
Survey Techniques ◽  
Geotechnical Investigations ◽  
Spanish Pyrenees ◽  
Parking Lot ◽  
Unstable Slope ◽  
Total Stability

This case study presents the engineering approach conducted for stabilizing a landslide that occurred at “El Portalet” Pass in the Central Spanish Pyrenees activated due to the construction of a parking lot. Unlike common slope stabilization cases, measures projected here were aimed at slowing and controlling the landslide, and not completely stopping the movement. This decision was taken due to the slow movement of the landslide and the large unstable mass involved. The degree of success of the stabilization measures was assessed by stability analyses and data obtained from different geotechnical investigations and satellite survey techniques such as GB-SAR and DinSAR conducted by different authors in the area under study. The water table was found to be a critical factor in the landslide’s stability, and the tendency of the unstable slope for null movement (total stability) was related to the water table lowering process, which needs more than 10 years to occur due to regional and climatic issues. Results showed a good performance of the stabilization measures to control the landslide, demonstrating the effectiveness of the approach followed, and which became an example of a good response to the classical engineering duality cost–safety.

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 Effect of River Salinity on Crop Diversity: A Case Study of South West Coastal Region of Bangladesh

2014 ◽  
Vol 8 ◽  
pp. 29-37 ◽  
Author(s):  
Animesh K. Gain ◽  
Kul P. Aryal ◽  
Pritish Sana ◽  
Md Nazim Uddin
Keyword(s):  
Negative Impact ◽  
Saline Water ◽  
Coastal Region ◽  
Saline Water Intrusion ◽  
South West ◽  
Agricultural Diversity ◽  
Structured Questionnaire ◽  
Local Farmers ◽  
Saline Zone

Saline water intrusion is a major problem and conflicting issue in south-west coastal region of Bangladesh. The increased salinity has negative impact on agricultural diversity in this region. The present study provides an assessment of perception of local farmers about changes of agricultural diversity mainly diversity of vegetable species (both summer and winter) and standing plants with the changes of salinity level in the nearby river. This study was carried out in January to August 2005 through semi-structured questionnaire in selected villages of different salinity prone areas such as high saline zone and moderate saline zone, namely Paikgacha and Rampal, respectively. The study has revealed that in Paikgacha, the salinity varies approximately within the range from 20,000 to 45,000 micro-mhos and in Rampal it is from 10,000 to 30,000 micro-mhos. Due to increased salinity, the summer vegetable species in Paikgacha and Rampal have been reduced from 16 to 2 and 15 to 9 respectively during the period 1975-2005. For winter vegetable species, this figure wasreduced from 13 to 9 in Paikgacha but in Rampal this number remained unchanged. Standing plant species in Paikgacha and Rampal have been reduced from 31 to 14 and 35 to21 respectively during that period. Agricultural diversity is reducing in substantial rate both spatially and temporally.Nepal Agric. Res. J. Vol. 8, 2007, pp. 29-37 DOI: http://dx.doi.org/10.3126/narj.v8i0.11576

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