NILE WATER HYACINTH PROCESSING PART (І) CHEMICAL CHARACTERISTICS OF HUMIC ACIDS EXTRACTED FROM NATURALLY HUMIFIED NILE WATER HYACINTH AND THEIR NATURAL HUMATES EFFECT ON MAIZE GRAIN YIELD

Document Type : Original Article

Abstract

ABSTRACT :
            The Egyptian Government and the private sector are interested in developing the low desert zone outside the flood plain of the River Nile. The low desert zone, west Qena Governorate, represents large future sustainable zone for different types of activities including agricultural, urbanization, wastewater disposal and landfill sites, and industrial zones. This zone covers ~1432 km2 and will be considered as a development corridor for Qena Governorate. The current study focuses on the analysis of the landuse changes in the area since 1972 as well as the evaluation of the groundwater resources for different purposes using the remote sensing and GIS techniques.
The results show that the landuse has been dramatically changed since 1972 till present by ~153.4 km2 including ~134.4 km2 of agricultural activities, which consider 9.4% of the total area of the low desert zone and other activities cover ~19 km2. Most of these changes that have been detected in the area range from 64 to 150 m (above sea level). In addition, the evaluation of groundwater for different uses in the study area using water quality index shows that some of the groundwater wells are not suitable for domestic, agricultural, and other activities.
يوجد في الوقت الحالي العديد من الاهتمامات الجادة من جانب الحکومة المصرية وکذلک المجتمع لتنمية النطاق الصحراوي، والذي يقع بين هضبة الحجر الجيري والأراضي الزراعية.
يعتبر النطاق الصحراوي غرب محافظة قنا من أهم وأکبر هذه النطاقات للتنمية المستدامة المستقبلية للعديد من المشروعات الکبرى، والتي من أهمها التنمية الزراعية، المدن السکنية، مشروعات الصرف الصحي والمخلفات الصلبة، وکذلک المشروعات الصناعية.ويمثل هذا النطاق مساحة تقدر بحوالي 1432 کم2، والذي  يعتبر کممر تنموي لمحافظة قنا.
ترکز الدراسة الحالية على تحليل التغيرات في استخدامات الأراضي بالمنطقة منذ عام 1972، وحتى الوقت الحاضر وکذلک تقييم مدى ملائمة المياه الجوفية للاستخدامات المختلفة.
وتعتمد الدراسة الحالية على استخدام التقنيات الحديثة، والتي تشتمل على تقنيات الاستشعار عن بعد ونظم المعلومات الجغرافية وکذلک الدراسات الحقلية.
بينت نتائج هذه الدراسة أن هناک تغيرات واضحة في استخدامات الأراضي منذ عام 1972 وحتى الوقت الحالي،وتقدر بحوالي 153.4 کم2 منها 134.4 کم2 استصلاح أراضي، والتي تمثل 9.4% من جملة المساحة الکليةوحوالي19 کم2 للأنشطة الأخرى. ومن الملاحظ أن معظم هذه التغيرات حدثت في النطاق الواقع عند منسوب أرضيبين 64 وحتى 150 متر عن سطح البحر.
وبالإضافة إلى ذلک بينت الدراسة من خلال تقييم مدي صلاحية المياه الجوفية للاستخدامات المختلفة أن هناک کثير من الآبار غير صالحة لأغراض الاستخدام الآدمي والزراعة والأغراض الأخرى.

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