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Showing 4 results for Microcatchment
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Volume 2, Issue 1 (7-2014)
Abstract
Abstract:
Because of existing rain deficiency in the arid and semi-arid areas, establishment the vegetation is being very difficult. Rain water harvesting systems (RWHS) can be used to help restoration of vegetation cover.
Hand tools such as spade and peck can be used for making small RWHS. In order to investigate the effect of the proposed system, a diamond shape microcatchment has been constructed in Maravehtapeh region located in the east of Golestan province. The purpose of the implementation of this method was to examine the establishment of olive seedlings in a dry area as well as to determine the effect of different types of catchment cover.
proposed catchment covers include: simple soil compaction , plastic cover supported with sand and natural (untouched) ground surface. The highest amount of runoff water was collected from plastic cover with runoff volumes of 1024 liter during one year measurement. This was three times higher than the ave. annual rainfall has happened in the region of investigation. Observations revealed the establishment of high yield olive seedlings at rainfed conditions.
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Volume 2, Issue 2 (9-2014)
Abstract
Abstract:
The deficiencies in water resources in the arid and semi-aridareas require adoption of procedures to combat them. One of these solutions is the use a rain water harvesting. Thus, the creation of dryland orchards in the microcatchmant method in the Gonbad area of Golestan province has been investigated in this respect. The experiment was conducted with three differentsurface treatments. In this experiment, the growth parameters of olive seedlings were investigated.This experiment that was carried out during the three years (during 2010 to 2012) has shown that with increasing the level of the basin, the vegetative parametersof the seedlingshas increased. Vegetative parameters measured include: diameter became, plant height seedling and Crown seedlings, respectively. Statistical data collected with the useof statistical methods to compare themean have been analyzed. The test results were independently compared and the significant statistical difference between the groups was completely confirmed.The mean values of the measured parameters for the three different treatments in the three year period of study in the 9, 16 and 25 square meters areas were 4.5, 5.3 and 6.4 centimeters in the collar diameters and for the plants with heights of 85, 98 and 103 cm and for crown seedlings of 4553 and 62 centimeters, respectively.
Mohammad Nekooeimehr, Mohammad Roghani,
Volume 7, Issue 1 (5-2019)
Abstract
Abstract
Present research has been executed in Chaharmahal va Bakhtiary Province during 5 years in order to develop and establish hillside orchards using rainwater harvesting catchments. The region receives 300 mm of rainfall annually and has a moderate soil texture. Towards this goal, in a rangeland with a slope of 20 percent, microcatchments were made with 5 different treatments including removed surface vegetation with gravelly filter, removed surface vegetation without gravelly filter, isolated surface with gravelly filter, isolated surface without gravelly filter, and natural surface, with 5 replicates and 3 cultivar of almond (Rabi, Mamaei and Shahrood 21). Vegetation indices were measured after cultivation of saplings in the lower part of microcatchments. Statistical analyses show that there is a significant difference between different microcatchments at the 99% confidence level. The results showed that the means of variables are the lowest on the natural surface treatment and the highest in the isolated surface with gravelly filter treatment. The mean value of diameter of stem, height, canopy area, and fruit yield are respectively 40.5 mm, 180 cm, 1.45 m2 and 1233.7 gr in the isolated surface with gravelly filter treatment. Using a system with an isolated surface and a gravelly filter can supply plants’ water needs. So utilization of isolated surfaces with gravelly filters can be recommended in supplying water for hillside orchards in watersheds using rainwater harvesting systems.
Reza Hassanpour, Mohammad Ebrahim Sadeghzadeh Reyhan, Khadijeh Seifzadeh, Ali Lotfollahi Markid,
Volume 11, Issue 3 (10-2023)
Abstract
During the last few decades, the ecosystem of natural areas has suffered as a result of improper exploitation of water and soil resources. To revive and develop renewable natural resources, it seems important to analyze and optimize rainfall storage systems and provide integrated techniques. Rainwater harvesting, in conjunction with plant species cultivation, is critical in the restoration and improvement of rangeland, particularly in dry areas. The present research was conducted with the aim of investigating the effect of rainwater harvesting methods (contour furrow and microcatchment) on increasing the percentage of vegetation cover in the Khajeh research station in East Azerbaijan province. To accomplish this, two methods of rainwater harvesting system, contour furrow and microcatchment, were established in the form of a randomized complete block design with three repetitions, in a land with a slope of 2-6%. After preparing the plots, Agropyron elongtum was planted in the form of seeding. Vegetation cover percentage was measured from the second year of planting for three years. A linear transect was used to determine vegetation cover percentage. The results showed that the microcatchment treatment significantly increased vegetation cover compared to the control. So that with the construction of the microcatchment, the vegetation cover increased about 183% (three times) compared to the control. In the case of contour furrow treatment, an increase of about 53% was observed compared to the control treatment. The microcatchment method performed better than the contour furrow, so that it increased the vegetation cover by about 85%. Therefore it seems the microcatchment is the best rainwater harvesting system in terms of increasing vegetation cover in the study area.
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