تقدير حجم الجريان السطحي لحوص وادي القصر في قضاء الشرقاط بطريقة CN-SCS))
الشريط الجانبي للمقالة
محتوى المقالة الرئيسي
الملخص
اعتمد البحث على طريقة (CN-SCS) وهي إحدى الطرق المهمة التي تستخدم لتقدير الحصاد المائي والتي طورتها ادارة صيانة التربة التابعة لإدارة الزراعة بالولايات المتحدة الامريكية (Soil Conservation (Service عام 1970م، ووضعت صيغتها المشهورة في عام 1986م، وأسلوب (SCS) عبارة عن مجموعة من المعادلات الرياضية يعتمد في مدخلاتها على توفير معلومات عن عطاءات الأرض وأنماط استخدامها وهيدرولوجية التربة، ونوع الغطاء النباتي، وكميات الأمطار الساقطة لمعرفة خصائص الجريان وامكانية حصاد المياه في حوض وادي السكران، من خلال معرفة وتحليل وصف الغطاء الاراضي ومعرفة أنواع الترب الهيدرولوجية في المنطقة وتحديد الحالة المسبقة لرطوبة التربة، وبعد استكمال هذه العناصر الثلاثة تم الحصول على قيم الـ CN التي تعبر عن مدى نفاذية التربة، والمعامل(( الذي يعبر عن الإمكانية القصوى لاحتفاظ التربة بالماء، والمعامل (LA) الذي يبين كمية المفقود من مياه الامطار قبل بدء الجريان السطحي، والمعاملين (2) و (CV) اللذان يعبران عن عمق وكمية حجم الجريان السطحي في المنطقة.
المقاييس
تفاصيل المقالة
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المراجع
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