Document Details
|
Document Type |
: |
Project |
|
Document Title |
: |
Environmental risk assessment of wastewater discharge Arna Valley Mecca تقييم المخاطر البيئية لتفريغ مياه الصرف الصحي بوادي عرنة بمكة المكرمة |
|
Document Language |
: |
Arabic |
|
Abstract |
: |
The main goal of this project is to study and assess the environmental impacts resulting from discharge of sewage water to Mecca on the East and along the bottom of the Arna Valley neighborhood Alkaakih from Mecca to the mouth of the canal on the Red Sea. And by focusing on the study of their impact on soil, surface water and groundwater, natural vegetation and agriculture.
This study included many scientific areas, including studies of geological and hydrogeological studies of the basin of the valley and biological studies of plants and microbiological studies (vital) to the valley water and wastewater. The study included assessing the performance and efficiency of the treatment plant in the region studied.
Data collection was available for the study area and access to previous reports, maps, aerial photographs and satellite images, as well as field reports from the companies that previous studies related to the subject of research. Field study was carried out of the course of the channel to collect samples of wastewater from the discharge channel and the surrounding wells, and samples were taken from healthy soil and polluted, as well as the compilation and classification of vegetation samples. Work was carried out geological and geophysical studies, mapping out the valley and drainage network sampling sites shown by the addition of geological data and FAOSTAT.
The study included as well as to analyze data and samples collected from water, soil and plants physically and chemically and biologically, as has been done developing interpretations of the laboratory and the work of desk studies and maps to the result of geological and geophysical studies, as well as the preparation of photographs showing the forms of wildlife and plant and animal forms of the earth's surface and pathways valleys sub-region study .
Was also prepared recommendations to reduce the risk of sewage on the quality of groundwater in the region, as well as determine the proportion of soil pollution in the valley and set the rates of chemical pollutants and harmful elements, and determine the type of viruses and bacteria in wastewater and its impact on plants and crops in the region, has been working on the initial assessment of the possibility of use of this water after being treated for the purposes of agricultural, industrial, and make recommendations to the scientific study of the future.
The evaluation of the impact of wastewater on the environment of the Valley of Arna is considered one of the objectives of this study and that the content of this water from the elements and concentrations of the pollutants, chemical and biological waste from domestic, industrial, and carry it from microbes and viruses and bacteria from human waste, which increased significantly during Umra and Hajj , which come to this spot pure millions of Muslims from around the globe to perform their religious rites.
Has been assessing the impact of the flow of sewage water treatment plant on soil Eekah Basin and Arna Valley, especially on the edges of the channel where he found that the clay material collected in the channel was originally formed from the remains of organic material contaminated. And tend samples of contaminated soil to the sub-acidic and contain high concentrations of salts g has been found that the soil drains contaminated soil chemically to contain high levels of concentrations of pollutants such as nitrates, phosphates, ammonia and sulfate compared to soil valley natural, as well as the presence of high concentrations of heavy metals harmful hazardous, such as zinc, manganese, copper, nickel, chromium, lead, cadmium, arsenic, fluorine, mercury, leading to contamination of groundwater and surface water during rainy seasons as well as contamination of plants and crops in the region.
The results of chemical analysis of groundwater from wells in the basin of the valley where Arna held channel sewage to be contaminated chemically to contain high levels of concentrations of chemical pollutants such as phosphate, ammonia, sulfate and hydrogen sulfide. And found that the water wells near the drains contain high levels of concentrations of harmful elements and heavy dangerous, such as zinc, manganese, copper, nickel and lead, which may also lead to contamination of plants and crops in the region, which absorb the harmful elements of the irrigation water and deposition in plants and therefore affect human health and animals. The groundwater and surface water basin and the lower is the Arna Valley as well as biologically contaminated because they contain a quantity of vital oxygen requirement exceeds the allowable limit in the specification of local and global.
The results of the study the plants of the basin area and Arna valley bottom to the presence of relatively high concentrations of zinc, chromium and barium in the tissues of plants selected and studied, and zinc is of greatest risk to public health and the highest concentration compared to local and international standards adopted.
The results of chemical analysis, biological and microbiological water drains Valley Arna and flowing from the treatment plant Eekah after comparing the values allowed in the specifications of local Arabia and the global water irrigation and drinking water as water contaminated with the biology of the high rate requirement is vital oxygen, and contaminated chemically to contain the waters of the increase in the elements chemicals such as calcium, magnesium, sodium, and concentrations of heavy metals harmful, such as zinc, manganese, copper, nickel, lead and chromium, as well as increased high-arsenic, and the sewage is semi-acid is not suitable at all for use Adamic not for agricultural purposes in its current state. |
|
Publishing Year |
: |
1421 AH
2001 AD |
|
Added Date |
: |
Wednesday, April 30, 2008 |
|
Researchers
| عباس عيفان الحارثي | alharthy, abbas eifan | Investigator | Doctorate | |
|
Back To Researches Page
|