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Potential Erosion Risk Calculation Using Remote Sensing and GIS in oued El Maleh Watershed, Morocco

Journal of Geographic Information System 2015年第2期7卷 128-139页

作者： Hicham Lahlaoi Hassan Rhinane Atika Hilali Said Lahssini Loubna Khalile Geosciences Laboratory Faculty of Sciences Ain Chock Hassan II University Casablanca Morocco National School of Forestry Engineering Salé Morocco

oued El Maleh watershed is considered the largest ocean basin of the Chaouia-Ouardigha region in Morocco. Severe flooding occurred in 1996, 2001 and 2002 in the watershed. Thus, significant economic and human damage has been caused. The floods of Mohammedia city, located in the outlet of the watershed, were due to the silting of the oued El Maleh dam which has lost its ability to retain water. This work, therefore, aims to assess soil losses by water erosion in the oued El Maleh watershed through modeling main factors involved in water erosion. The methodology used is based on the use of the universal soil loss equation (USLE). The model includes the following factors: soil erodibility, the inclination of slopes, the rainfall erosivity, vegetation cover and erosion control practices. The aggressiveness of rainfall was calculated for a number of stations bordering the study area and interpolated across the watershed using geostatistical model. Soil erodibility was extracted from soil map and soil survey. The effect of topography was approached by combining the degree of slope and slope length using a digital elevation model (ASTER) and ArcHydrology extension (ArcGIS). The vegetation cover was derived from Landsat image ETM through the supervised classification method. The index of erosion control practices was approached by field visits. All factors have been measured and integrated into a geographic information system which enabled us to spatialize the degree of sediment production at the watershed scale in a synthetic map. The annual soil loss is 8.21 t/ha/yr and the soil loss classification shows that surfaces affected by high erosion are equivalent to 10% of the watershed. Furthermore, this map is available to support land managers policy makers in the process of decision making related to soil conservation, infrastructure and citizens’ property protection.

关键词： Watershed oued El Maleh Erosion USLE Geographic Information System

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Geophysical Contribution to the Determination of the Limit between Laayoune and Foum El oued Aquifers, Origin of Supply Sources of oued Sakia El Hamra, Laayoune Province, Morocco

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International Journal of Geosciences 2019年第11期10卷 1008-1035页

作者： Mohamed Chibout Anasse Benslimane Mohamed El Mokhtar Fatima Zahra Faqihi Sidi Mokhtar El Kanti Ahmed Ntarmouchant Laboratory of Geodynamics and Natural Resources (LGRN) Faculty of Sciences Dhar Mahraz Sidi Mohamed Ben Abdellah University Fez Morocco Laboratory of Geosciences and Natural Resources Faculty of Sciences University Ibn Tofail Kenitra Morocco. AFRICA GEO-SERVICES Company 33 Offices Al Manar Street Abd Elkarim Khattabi Fez VN Morocco Hydraulic Basin Agency of Sakia El Hamra and oued Ed-Dahab Administrative District Laayoune Morocco

Laayoune and the Foum El oued aquifers are in hydraulic communication only at the level of oued Saguia El Hamra. The present study has accordingly made use of all the hydrogeological, hydrological, geological and geophysical data that preceded the watershed of oued Saguia El Hamra in its downstream part. These data are by no means omplementary with the objective of having a better understanding of the boundary line between Laayoune and Foum El oued aquifers and the origin of feeding the sources of oued Saguia El Hamra. This study will focus only on the previous geophysical studies where a reinterpretation of electrical soundings has proved useful as a result of the recent well-logging results. It makes it possible to highlight the presence of a significant rise in the truncated marly substratum of oued Saguia El Hamra and depressions (left and right banks) which could correspond to stream channels or depressed areas. At the level of the Wadi bed, there has been a regular immersion of the conductive level roofs from east to west towards Foum El oued favoring the flow of wastewater from the zone and spraying the brackish water sources towards the groundwater of Foum El oued. In the light of the reinterpretation of electric polls, plus as well as the geophysical surveys by electrical tomography and high definition made at the right and left banks of the Oueed Saguia El-Hamra, it was possible to verify the existence of dry ridge separating the two webs of Laayoune and Foum El oued and stream channels or depressed areas of the left bank for drainage of brackish water to sources located along oued Saguia El Hamra. The true resistivity models tomography profiles confirm the presence of the backbone at the left and right banks and the graben of the left bank for underground water drainage of the web Laayoune to sources welling the river Saguia El Hamra. They reveal the presence of a quaternary plio-cover (coastal platform Moghrebian) as being heterogeneous and affected by m

关键词： Laayoun and Faum Al oued Aquifers Ridge Limit Wastewater Brackish Wa-ter Marl Bedrock Vertical Electrical Sounding (SEV) Electrical Tomography (ETR)

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Geomorphosite Valorization a View to Sustainable Development: Case of Ait Hajji, oued Boulahmayel Valley, Central Morocco

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Journal of Geographic Information System 2011年第1期3卷 12-17页

作者： Nahraoui Fatima Zahra El Wartiti Mohamed Zahraoui Mohamed Dabi Sanaa 不详

The Pleistocene Fluvial-lacustrine of Ait Hajji Formation is located in South East of Tiddas, and in the Qua-ternary deposits of the Moroccan Central Plateau. These outcrops represent on a geomorphosite of great im-portance for the study of geological heritage, and for a natural eco-tourism valorization in Morocco. For to aim a natural tourism promotion, for indigenous peoples, this geomorphosite in question has an fluorescent and dense flora with a diversified fauna in the heart of one Ordovician quartzite bar and Devonian limestone ridges. In oued Boulahmayel geomorphosite contains a memory geological Formation of a Pleistocene epi-sode, beginning firstly by a dynamic fluviatil land synchronous with a local volcanic activity (Phonolite ne-phelinc) replaced by a lake sedimentation related to the formation of a dam natural, created a few hundred meters downstream from Boulahmayel. For valorizing of the hinterland of the plains towns, it is necessary to develop a geo-eco-tourism integrated who provide its harvest and will argue the benefits resources of rural people of high-mountains in their own environment. It is proposed in the perspective to initiate a sustainable development approach, while ensuring the conservation and ensure the continued natural existence of the surroundings environments and to appreciate the potential of the region. Thus that beauty hidden in the hin-terland upstream to a tourist eager for discoveries, to encourage them to practice their stay as short as it is, in a safe space and very quiet. In order to materialize the concept of geo-eco-tourism, we must deploy the ef-forts of local people, policy makers and scientists in order to produce tourist maps with different interesting routes, to implant signal panels, to develop tracks campsites and trails within the forests, creating shelters and rest houses in private homes, as well as provide training for specialized guide’s rescuers.

关键词： Geological Site Geomorphology Central Morocco Ait Hajji oued Boulahmayel Fluvial-lacustrine Formations Geo-eco-tourism Sustainable Development

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阿尔及利亚oued Mya盆地438B区块下泥盆统储层沉积学特征

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成都理工大学学报（自然科学版） 2011年第5期38卷 481-486页

作者：郑荣才张天玲潘杨辉胡诚赵灿 "油气藏地质及开发工程"国家重点实验室(成都理工大学) 成都610059 四川省核工业地质调查院成都610061

利用钻井岩心、测井资料和层序-岩相古地理编图,研究了阿尔及利亚oued Mya(韦德迈阿次)盆地438B区块下泥盆统储层沉积学特征。该盆地是一个富含油气的古生代-中生代叠合盆地,438B区块地处盆地西北部,区块内下泥盆统发育有陆棚和障壁岛-... 详细信息

利用钻井岩心、测井资料和层序-岩相古地理编图,研究了阿尔及利亚oued Mya(韦德迈阿次)盆地438B区块下泥盆统储层沉积学特征。该盆地是一个富含油气的古生代-中生代叠合盆地,438B区块地处盆地西北部,区块内下泥盆统发育有陆棚和障壁岛-滨岸2个沉积体系,具备良好的油气生、储、盖组合和勘探开发潜力。其中障壁岛-滨岸沉积体系由障壁砂坝、潮汐通道、冲溢扇、潟湖、潮坪等沉积微相组成。以储层沉积学分析为基础的储层预测和评价结果,表明储层发育主要受高位体系域的障壁砂坝和冲溢扇沉积微相控制。这2个沉积微相可列为主要的勘探目标。

关键词：储层沉积学层序-岩相古地理下泥盆统 oued Mya盆地阿尔及利亚

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Evaluation of the River-Shallow Aquifer Exchange Process Effect on Surface Water Quality Deterioration

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Journal of Geoscience and Environment Protection 2017年第6期5卷 123-134页

作者： Ismail Karaoui Abdelkrim Arioua Abdelkhalek El Amrani Idrissi Wafae Nouaim Driss Elhamdouni Kamal Ait Ouhamchich Mohammed Hssaisoune Rachid Hnini Faculty of Sciences and Technologies Sultan Moulay Slimane University Beni Mellal Morocco Oum Er-Rbia Hydraulic Basin Agency Beni Mellal Morocco Faculty of Sciences Ibn Tofail University Kenitra Morocco

Recently, according to a survey carried out in oued El Abid River by Oum Er-Rbia Hydraulic Basin Agency concerned about the surface water quality, the downstream course is undergoing continual degradation in its water quality comparable to the upstream. This study comes to localize the sources of pollution and explains the process of degradation, which affects the water quality in that area. For this purpose, an inspection of the place has been done during January 2017 to cover the entire zone limited by the affected part of river, followed by a survey, which interests to water quality and the ground-water depth. The inspection doesn’t show any direct liquid discharge into the river;meanwhile the water quality degradation is related to the underground sources through river-shallow-aquifer exchange process, when the obtained results from the survey showed that severe parameters are involved in the degradation of groundwater, as the geology and agricultural activities. Combining these results with flow direction in groundwater, it is clear that pollutants are transported to the river via the river-shallow aquifer exchange process, which affects its quality. Based on the finding results, this study will give the decision makers a simple view to a complex pollution processing.

关键词： Contamination Groundwater oued El Abid River Shallow Aquifer Water Quality

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阿尔及利亚416a-417区块勘探潜力与勘探方向浅析

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石油天然气学报 2005年第S1期27卷 183-184页

作者：翟爱军江苏油田海外事业部江苏扬州225009

阿尔及利亚416a-417区块(El Hadjira 区块)是阿尔及利亚第五轮区块招标中石化国际公司的中标区块,该项目主合同(PSC)于2005年3月26日正式生效。从区域构造背景、勘探成果、油藏类型和勘探潜力分析入手,对该区块下步勘探进行了初步总... 详细信息

阿尔及利亚416a-417区块(El Hadjira 区块)是阿尔及利亚第五轮区块招标中石化国际公司的中标区块,该项目主合同(PSC)于2005年3月26日正式生效。从区域构造背景、勘探成果、油藏类型和勘探潜力分析入手,对该区块下步勘探进行了初步总体规划。

关键词：部署方向勘探潜力 416a-417区块 oued Mya盆地阿尔及利亚

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阿尔及利亚438区块古生代构造演化及油气成藏特征

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世界地质 2012年第1期31卷 155-161页

作者：姜均伟曾玉强胡友良中国石油长城钻探工程公司解释研究中心北京100101

阿尔及利亚438区块位于阿尔及利亚oued Mya盆地北部。利用石油地质理论和测试、测井解释资料,解析阿尔及利亚438区块古生代地层和油藏特征。分析表明,438区块所属的oued Mya盆地古生代属于克拉通盆地,沉积了奥陶系、志留系和泥盆系多套... 详细信息

阿尔及利亚438区块位于阿尔及利亚oued Mya盆地北部。利用石油地质理论和测试、测井解释资料,解析阿尔及利亚438区块古生代地层和油藏特征。分析表明,438区块所属的oued Mya盆地古生代属于克拉通盆地,沉积了奥陶系、志留系和泥盆系多套海相地层,发育有志留系泥页岩和奥陶系页岩两套烃源岩,具备良好的生储盖条件。根据NGS-P1井的实探资料,裂缝在奥陶系的Hamra石英砂岩的成藏中起主导作用,应为裂缝型圈闭;构造和岩性在Dale de M'Kratta砂岩和泥盆系砂岩的成藏中起主导作用,应为构造-岩性圈闭,推断本区古生代油气成藏模式为断层输导型。

关键词：阿尔及利亚 438区块 oued Mya盆地奥陶系含油气系统成藏模式

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阿尔及利亚B区块上三叠统高分辨率层序及储层特征

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沉积与特提斯地质 2009年第2期29卷 60-65页

作者：王昌勇郑荣才胡忠贵周祺王建国成都理工大学"油气藏地质及开发工程"国家重点实验室四川成都610059 中国石油玉门油田分公司勘探开发研究院甘肃酒泉735019

阿尔及利亚B区块位于oued Mya盆地东部,自奥陶纪以后该盆地多次发生隆升剥蚀,加里东运动造成志留纪和盆纪地层不同程度的缺失。海西期基底隆升,造成石炭纪和二叠纪地层的完全缺失,并在晚三叠世早期开始发育辫状河沉积。B区块晚三叠世沉... 详细信息

阿尔及利亚B区块位于oued Mya盆地东部,自奥陶纪以后该盆地多次发生隆升剥蚀,加里东运动造成志留纪和盆纪地层不同程度的缺失。海西期基底隆升,造成石炭纪和二叠纪地层的完全缺失,并在晚三叠世早期开始发育辫状河沉积。B区块晚三叠世沉积具有从早期的辫状河向中期的曲流河和晚期的盐湖演化特点,其过程较为复杂。在晚三叠世早中期发生强烈的火山喷发作用,在研究区内堆积了厚度巨大的火山岩,使研究砂体的时空展布和演化规律变得更为复杂。通过高分辨率层序分析,建立了B区块晚三叠世的等时地层格架,为恢复研究区等时条件下的古地理特征奠定了基础,并明确了层序对储层的控制规律,为该区进一步的油气勘探和开发提供了依据。

关键词：高分辨率层序储层特征上三叠统阿尔及利亚 oued Mya盆地

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阿尔及利亚416a-417区块油气成藏条件分析

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小型油气藏 2006年第3期11卷 6-10页

作者：季红军丁正青储海松翁望飞高韧江苏油田分公司物探技术研究院江苏南京210046

在阿尔及利亚oued Mya盆地416a-417区块烃源条件、储层条件、盖层条件等基本石油地质条件分析的基础上，总结了该区油气运移成藏模式；结合探井钻探情况，对该区油气成藏主控因素及油气聚集分布规律进行分析，为下一步油气勘探提供了参... 详细信息

在阿尔及利亚oued Mya盆地416a-417区块烃源条件、储层条件、盖层条件等基本石油地质条件分析的基础上，总结了该区油气运移成藏模式；结合探井钻探情况，对该区油气成藏主控因素及油气聚集分布规律进行分析，为下一步油气勘探提供了参考依据。

关键词：阿尔及利亚 oued Mya 盆地成藏模式成藏控制因素油气聚集规律

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阿尔及利亚438b区块三叠系Serie Inferiere段储层平面非均质性研究

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岩性油气藏 2009年第2期21卷 24-28页

作者：魏钦廉郑荣才肖玲马国富窦世杰田宝忠西安石油大学油气资源学院 710065 成都理工大学'油气藏地质及开发工程'国家重点实验室中国石油天然气股份有限公司玉门油田分公司勘探开发研究院

通过岩心、录井、测井等资料综合研究,分析了阿尔及利亚438b区块三叠系SerieInferiere段的辫状河沉积特征。采用熵权法,综合考虑孔隙度、砂岩密度、渗透率突进系数、渗透率变异系数、渗透率级差和夹层频率等6种影响储层非均质性的因素,... 详细信息

通过岩心、录井、测井等资料综合研究,分析了阿尔及利亚438b区块三叠系SerieInferiere段的辫状河沉积特征。采用熵权法,综合考虑孔隙度、砂岩密度、渗透率突进系数、渗透率变异系数、渗透率级差和夹层频率等6种影响储层非均质性的因素,计算了研究区三叠系SerieInferiere段储层平面非均质综合指数,并在沉积相约束下,绘制了储层平面非均质性展布图。该方法充分利用熵权法的弱化和强化,即去同存异的特点,较准确地表征了研究区储层的非均质性。

关键词：储层非均质性三叠系综合指数 oued Mya盆地

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