Fisheries development in Vietnam: A case study in the exclusive economic zone

Pursuant to statement issued by the Government of Vietnam on 12 May 1977, on the territorial sea, the contiguous zone, the exclusive economic zone (EEZ) and the continental shelf of Vietnam, and according to the provisions of the LOS Convention, the EEZ of Vietnam extends principally up to 200 NM from the baseline, and the area of EEZ amounts to about one million square km including the Hoang Sa (Paracel) and Truong Sa (Spratly) Islands [The declaration of the Government of Vietnam on the territorial sea, contiguous zone, exclusive economic zone and continental shelf, Hanoi, 1977]. The establishment of EEZ has significantly changed circumstances for the fisheries sector in Vietnam.Recently, even though the adaptation of new techniques and technologies to the fisheries sector has been somewhat successful and resulted in the limitation of effective exploitation opportunities, sea fishing is still very important to the economy of Vietnam. In fact, fisheries development in Vietnam has the following important objectives, whether pursued in marine or fresh water: foreign exchange earnings; protein for local diets and feeds for live stock; provision of employment. However, a matter of concern is that the outdate fishing methods and uncontrolled fishing are damaging the marine environment and living resources. These problems have been recognized and courses of action have been formulated. A prerequisite condition for resolving this issue is to have a mechanism for synchronized policies which are guaranteed by appropriate macro management. The main purposes of this paper are a review of some aspects of fisheries sector development and management in Vietnam in the light of the new regime of the EEZ, represented in the LOS Convention. An important objective of the paper is the emphasis on the problem of policy-relevant research for fisheries sector management in the future.     

长江口表层沉积物重矿物在不同粒级中的分布与研究意义

在粒度分析基础上,以0.5Φ为间距对长江口表层沉积物的不同粒级分样进行碎屑重矿物分析,并对各粒级重矿物特征与广粒级(1.5Φ～6Φ)进行相似度分析。结果表明,长江口沉积物粒度跨度大,从粗砂到泥(黏土)均有分布,粉砂含量高。样内不同粒级分样重矿物含量、种类和组合均有一定变化,样间表现出较一致的规律性。长江口出现碎屑重矿物30种左右,粗粒级分样中矿物种数为10余种,细粒级分样中重矿物种类增至20多种;3.5Φ～4.5Φ是重矿物种类多、矿物成分复杂的粒级区段。粗粒级(粒径大于3Φ)云母族富集,其重矿物组合为云母+角闪石,随粒级变细(粒径小于4Φ)云母急剧减少;闪石族分布粒级广泛,在3Φ～5Φ粒级含量相对较高;帘石族、稳定矿物尤其是金属矿物在粒径小于3.5Φ粒级逐渐增多。长江口重矿物整体组合为普通角闪石+绿帘石+褐铁矿,榍石为特征矿物。相似度分析表明,长江口沉积物样品中主要粒级与广粒级重矿物特征相近,能代表沉积物整体重矿物特征。长江口碎屑重矿物特征深受粒度分布的影响,其矿物种类、矿物组合和矿物指数及其所蕴含的水动力和物源意义都要结合粒度特征来综合分析。     

Evaluation of storm wave-induced silty seabed instability and geo-hazards: A case study in the Yellow River delta

Models based on the theoretical framework of soil mechanics are presented to evaluate storm wave-induced silty seabed instability and geo-hazards through a case study in the Yellow River delta. First, the transient and residual mechanisms of wave-induced pore pressure are analyzed. Three typical models (i.e., elastic model, pore pressure development mode and elasto-plastic model) are proposed to calculate wave-induced stresses in the seabed. Next, mechanisms and calculation methods of wave-induced seabed instability modes such as scour, liquefaction, seepage instability and shear slide are proposed. Typical results of storm wave-induced excess pore pressure and seabed instability are given and relevant discussions are made. At last, the formation mechanism of geo-hazards in the Yellow River delta is analyzed based on the proposed mechanism and calculated results. Results and analysis indicate that both transient and residual mechanisms are important to storm wave-induced response of silty seabed and hence the elasto-plastic model is more appropriate. Complete liquefaction does not happen, while other types of instability occur mostly within 2–6 m under the seabed surface. Wave-induced scour, seepage instability and shear slide are all possible instability modes under the 1-year storm waves, and scour is predominant for the 50-year storm waves. The formation mechanism of geo-hazards such as shallow slide and storm wave reactivation, pockmarks, silt flow and gully, disturbed stratum and hard crust in the Yellow River are well explained based on the proposed mechanisms and calculated results of storm wave-induced silty seabed instability.     

Estimation of seismic velocities and gas hydrate concentrations: A case study from the Shenhu area,northern South China Sea

In the Shenhu area of the northern South China Sea (SCS), canyon systems and focused fluid flow systems increase the complexity of the gas hydrate distribution in the region. It also induces difficulties in predicting the hydrate reservoir characteristics and quantitatively evaluating reservoir parameters. In this study, several inversion methods have been executed to estimate the velocities of strata and gas hydrate concentrations along a profile in the Shenhu area. The seismic data were inverted to obtain the reflection coefficient of each stratum via a spectral inversion method. Stratigraphic horizons were then delineated by tracking the inverted reflectivities. Based on the results of spectral inversion, a low-frequency velocity field of the strata was constructed for acoustic impedance inversion. Using a new iterative algorithm for acoustic impedance inversion, reflection coefficients were converted into velocities, and the velocity variations of the strata along a 2D seismic line were then obtained. Subsequently, gas hydrate saturations at well SH2 were estimated via the shale-corrected resistivity method, the chloride ion concentration method and three different rock physics models. The results were then compared to determine the optimal rock physics model, and the modified Wood equation (MWE) was found to be appropriate for this area. Finally, the inverted velocities and MWE were used to predict the distribution and concentrations of gas hydrates along the seismic line. The estimated spatial distribution of gas hydrates is consistent with that from sonic logging and resistivity data at well SH2, and with the drilling results. Therefore, this method is applicable in areas with no well data, or with few wells, and provides an effective tool for predicting and evaluating gas hydrates using seismic data.     

大陆型山谷冰川冰震的规律和影响因素——以老虎沟12号冰川为例

2015年10月,利用便携式宽频带地震仪在祁连山老虎沟12号冰川上进行了9 d的冰震观测,在台站的震动信号中识别出大量与冰川动态特性相关的冰震。根据信号的频率等特征,可将其分为短周期冰震和长周期冰震。短周期冰震的持续时间大多在0.1 s以下,频谱集中在20~100 Hz之间,其数量可达每天6 600个,占所检测到冰震的绝大部分。长周期冰震持续时间可达几十秒至数小时,其地震波形频率集中在0.1~10 Hz,观测期间检测到296次长周期冰震。对比冰震发震时间和当地气温发现:气温下降,短周期冰震事件数量快速增加;气温升高,短周期冰震数量逐渐减少。短周期冰震的发震时间分布呈现出以1 d为周期变化的特征。利用麦克斯韦模型模拟的冰川在气温影响下的应力变化可以解释观测到的冰震日变性:当气温下降,冰川温度下降,冰体积收缩并产生应变,相应的拉张应力使得冰裂隙破裂而产生短周期冰震信号。     

海岸带土地发展潜力评价——以杭州湾南岸为例

土地潜力评价是编制土地利用规划的前提,把握土地的潜在经济效能是城镇化、工业化快速推进背景下土地资源合理配置的重要命题。本文甄选自然条件、生态敏感性、经济发展和空间结构指标建立了土地发展潜力评价体系,分别采用模糊综合评价法与网络层次分析法赋权指标体系与计算权重,测度发展潜力值并划分了杭州湾南岸余姚、慈溪和镇海的海岸带土地发展潜力区。结果显示:(1)低发展潜力区面积为237.14 km²,占比为17.73%;中发展潜力区面积为323.08 km²,占比为24.15%;高发展潜力区面积为473.34 km²,占比为35.38%;极高发展潜力区面积为304.27 km²,比例为22.74%。(2)按照地类的级别面积分析,交通运输用地和自然保留地面积在极高潜力区中达到峰值,呈由高向低等级面积递减态势;耕地、其他农用地、城乡建设用地和其他建设用地在高潜力区中占比最大,且基本布局于极高、高潜力区;园地、河流水面、水利建设用地集中于中潜力区,而沿海滩涂与林地基本分布于低、中潜力区。(3)余姚、慈溪和镇海海岸带土地发展潜力分区呈现不同特点,余姚属于待提升型,慈溪为均衡发展型,镇海是高质发展潜力型。     

Evaluating the NOAA Coastal and Marine Ecological Classification Standard in estuarine systems: A Columbia River Estuary case study

A common first step in conservation planning and resource management is to identify and classify habitat types, and this has led to a proliferation of habitat classification systems. Ideally, classifications should be scientifically and conceptually rigorous, with broad applicability across spatial and temporal scales. Successful systems will also be flexible and adaptable, with a framework and supporting lexicon accessible to users from a variety of disciplines and locations. A new, continental-scale classification system for coastal and marine habitats—the Coastal and Marine Ecological Classification Standard (CMECS)—is currently being developed for North America by NatureServe and the National Oceanic and Atmospheric Administration (NOAA). CMECS is a nested, hierarchical framework that applies a uniform set of rules and terminology across multiple habitat scales using a combination of oceanographic (e.g. salinity, temperature), physiographic (e.g. depth, substratum), and biological (e.g. community type) criteria. Estuaries are arguably the most difficult marine environments to classify due to large spatio-temporal variability resulting in rapidly shifting benthic and water column conditions. We simultaneously collected data at eleven subtidal sites in the Columbia River Estuary (CRE) in fall 2004 to evaluate whether the estuarine component of CMECS could adequately classify habitats across several scales for representative sites within the estuary spanning a range of conditions. Using outputs from an acoustic Doppler current profiler (ADCP), CTD (conductivity, temperature, depth) sensor, and PONAR (benthic dredge) we concluded that the CMECS hierarchy provided a spatially explicit framework in which to integrate multiple parameters to define macro-habitats at the 100 m² to >1000 m² scales, or across several tiers of the CMECS system. The classification's strengths lie in its nested, hierarchical structure and in the development of a standardized, yet flexible classification lexicon. The application of the CMECS to other estuaries in North America should therefore identify similar habitat types at similar scales as we identified in the CRE. We also suggest that the CMECS could be improved by refining classification thresholds to better reflect ecological processes, by direct integration of temporal variability, and by more explicitly linking physical and biological processes with habitat patterns.     

珠江河口混浊高产水域叶绿素a浓度的遥感估算模型

近年来为提高混浊高产水体叶绿素a浓度的估算精度,Gitelson等提出了一种基于红与近红外3个波段遥感反射率的概念模型.文章基于2004年的实测数据,检验该概念模型在珠江河口水域的适用性,估算该概念模型以及它的特殊形式--两波段模型对应的光谱位置,在此基础上构建利用卫星数据提取珠江河口水域叶绿素a浓度的遥感估算模型.结果表明,珠江河口混浊高产水域叶绿素a浓度与三波段模型和两波段模型均有很强的线性相关性,相关系数分别达到0.91与0.88.构建的三波段模型和两波段模型估算的叶绿素a浓度与实测叶绿素a浓度的均方根差(RMSE)分别为5.82mg·m-3和6.53mg·m-3,精度高于其他常用算法.根据MERIS的波段设置构建的三波段模型估算的叶绿素a浓度与实测叶绿素a浓度的RMSE为6.47mg·m-3,显示了良好的应用潜力.     

海洋上层暖水在热带气旋迅速增强中的作用:基于台风威马逊(1409)的个例研究

在登陆海南岛之前,台风威马逊在南海北部从热带风暴级别迅速增强成为超强台风。观测数据的分析结果显示,海洋上层的异常暖水在威马逊的迅速增强过程中扮演了重要的角色。威马逊期间,南海北部的海表面温度相比于气候态海表面温度暖很多。这部分异常暖水为威马逊提供了更多的能量,从而导致了威马逊的迅速增强。数值模拟结果进一步证明,南海北部的暖水在台风威马逊的迅速增强过程中起重要作用。如果没有这团异常暖水的影响,威马逊只增强25 hPa,仅为有暖水影响条件下增强程度的58.1%。     

Comparing different spatial interpolation methods to predict the distribution of fishes: A case study of Coilia nasus in the Changjiang River Estuary

Spatial-temporal distribution of marine fishes is strongly influenced by environmental factors. To obtain a more continuous distribution of these variables usually measured by stationary sampling designs, spatial interpolation methods(SIMs) is usually used. However, different SIMs may obtain varied estimation values with significant differences, thus affecting the prediction of fish spatial distribution. In this study, different SIMs were used to obtain continuous environmental variables(water depth, water temperature, salinity, dissolved oxygen(DO), p H,chlorophyll a and chemical oxygen demand(COD)) in the Changjiang River Estuary(CRE), including inverse distance weighted(IDW) interpolation, ordinary Kriging(OK)(semivariogram model: exponential(OKE),Gaussian(OKG) and spherical(OKS)) and radial basis function(RBF)(regularized spline function(RS) and tension spline function(TS)). The accuracy and effect of SIMs were cross-validated, and two-stage generalized additive model(GAM) was used to predict the distribution of Coilia nasus from 2012 to 2014 in CRE. DO and COD were removed before model prediction due to their autocorrelation coefficient based on variance inflation factors analysis. Results showed that the estimated values of environmental variables obtained by the different SIMs differed(i.e., mean values, range etc.). Cross-validation revealed that the most suitable SIMs of water depth and chlorophyll a was IDW, water temperature and salinity was RS, and p H was OKG. Further, different interpolation results affected the predicted spatial distribution of Coilia nasus in the CRE. The mean values of the predicted abundance were similar, but the differences between and among the maximum value were large. Studies showed that different SIMs can affect estimated values of the environmental variables in the CRE(especially salinity).These variations further suggest that the most applicable SIMs to each variable will also differ. Thus, it is necessary to take these potential impacts into consideration when studying the relationship between the spatial distribution of fishes and environmental changes in the CRE.     

海岸带土地利用格局演化及多情景开发模拟¬——以宁波市为例

海岸带土地在高强度开发下变化显著,明确其演化规律和驱动因子,为优化土地利用结构和合理利用海岸带资源提供重要依据。基于1990－2020年7期土地利用数据,利用土地利用强度指数、地理探测器模型等方法,分析宁波市海岸带土地利用格局演变特征及驱动因子;同时利用CA-Markov模型对2025年和2030年宁波市海岸带土地利用格局进行模拟。结果表明：（1）宁波市海岸带土地利用类型主要为林地和耕地,土地利用格局演化明显,其中耕地面积不断减少,林地、草地、水域和未利用地面积发生小幅度动荡,建设用地面积快速增长。（2）宁波市海岸带土地利用强度不断增加,研究区北部增长趋势明显,而南部增长速度缓慢。（3）地形和坡度是影响宁波市海岸带土地利用变化的主要自然因素,但影响程度不断减弱;GDP密度和人口密度是主要社会经济影响因素,影响强度逐渐增强;因子间交互作用类型主要为双因子增强和非线性增强,社会经济因子与自然因素中的海拔和坡度交互作用最为强烈。（4）未来宁波市海岸带土地利用变化剧烈区域将集中于杭州湾南岸、象山县东北部和宁海县南部,生态保护情景能最大程度保持土地利用结构稳定,有效缓解人地矛盾。     

Submarine canyon development in the Izu-Bonin forearc: A SeaMARC II and seismic survey of Aoga Shima Canyon

SeaMARC II sidescan (imagery and bathymetry) and seismic data reveal the morphology, sedimentary processes, and structural controls on submarine canyon development in the central Izu-Bonin forearc, south of Japan. Canyons extend up to 150 km across the forearc from the trench-slope break to the active volcanic arc. The canyons are most deeply incised (1200–1700 m) into the gentle gradients (1–2°) upslope on the outer arc high (OAH) and lose bathymetric expression on the steep (6–18°) inner trench-slope. The drainage patterns indicate that canyons are formed by both headward erosion and downcutting. Headward erosion proceeds on two scales. Initially, pervasive small-scale mass wasting creates curvilinear channels and pinnate drainage patterns. Large-scale slumping, evidenced by abundant crescent-shaped scarps along the walls and tributaries of Aoga Shima Canyon, occurs only after a channel is present, and provides a mechanism for canyon branching. The largest slump has removed >16 km³ of sediment from an 85 km² area of seafloor bounded by scarps more than 200 m high and may be in the initial stages of forming a new canyon branch. The northern branch of Aoga Shima Canyon has eroded upslope to the flanks of the arc volcanoes allowing direct tapping of this volcaniclastic sediment source. Headward erosion of the southern branch is not as advanced but the canyon may capture sediments supplied by unconfined (non-channelized) mass flows.Oligocene forearc sedimentary processes were dominated by unconfined mass flows that created sub-parallel and continuous sedimentary sequences. Pervasive channel cut-and-fill is limited to the Neogene forearc sedimentary sequences which are characterized by migrating and unconformable seismic sequences. Extensive canyon formation permitting sediment bypassing of the forearc by canyon-confined mass flows began in the early Miocene after the basin was filled to the spill points of the OAH. Structural lows in the OAH determined the initial locus of canyon formation, and outcropping basement rocks have prevented canyon incision on the lower slope. A major jog in the canyon axis, linear tributaries, and a prominent sidescan lineament all trend NW-NNW, reflecting OAH basement influence on canyon morphology. This erosional fabric may reflect joint/fracture patterns in the sedimentary strata that follow the basement trends. Once the canyons have eroded down to more erosion-resistant levels, channel downcutting slows relative to lateral erosion of the canyon walls. This accounts for the change from a narrow canyon axis in the thickly sedimented forearc basin to a wider, more rugged canyon morphology near the OAH. About 9500 km³ of sediment has been eroded from the central, 200 km long, segment of the Izu-Bonin forearc by the formation of Aoga Shima, Myojin Sho and Sumisu Jima canyons. The volume of sediment presently residing in the adjacent trench, accretionary wedge, and lower slope terrace basin accounts for <25% of that eroded from the canyons alone. This implies that a large volume (>3500 km³ per 100 km of trench, ignoring sediments input via forearc bypassing) has been subducted beneath the toe of the trench slope and the small accretionary prism. Unless this sediment has been underplated beneath the forearc, it has recycled arc material into the mantle, possibly influencing the composition of arc volcanism.     

陆海统筹视角下国土空间开发适宜性集成评价研究——以浙江嘉兴市为例

在新一轮国土空间规划改革和区域高质量发展战略背景下，全域全要素互动互联的“陆海统筹”理念为沿海地区国土空间开发适宜性评价提供了新思路。本文基于陆、海系统“三类空间”（农业/渔业、城镇/港口、生态）功能和多要素集成评价思维，构建了陆海统筹视角下沿海地区国土空间开发适宜性评价的指标体系，在此基础上，提出“‘三类空间’功能评价—冲突识别—统筹修正”的三步走集成评价方法。嘉兴实证案例结果表明，该集成评价方法可以科学、准确地识别沿海地区陆海空间开发和保护的矛盾区。并通过冲突区域评价结果统筹，确定未来适宜进行建设、生产以及生态保护的陆海空间总规模，实现陆海统筹理念下沿海地区空间开发适宜性评价“一张图”，进而提升沿海地区空间管制的科学性和有序化。     

滨海城市旅游业可持续发展研究——以山东省烟台市为例

旅游业作为第三产业的重要组成部分,是世界上发展最快的新兴产业之一[1],滨海地区更是旅游资源丰富的地带,已成为世界旅游业发展最快的地区之一[2-4]。烟台市作为国内较为典型的滨海城市,已有较多关于其旅游业发展方面的研究,但基本是以烟台市区为研究对象,且主要是集中在传统的海洋旅游、葡萄酒城旅游等方面[5-6],缺乏将烟台市区及其所辖的县市作为一个旅游共同体的相关研究,更缺乏对颇具发展潜力的农业旅游方面的研究和宣传。烟台市所辖的县市区均有着较丰富的旅游资源,尤其是农业旅游资源,农业旅游研究在国内早已开展,具有“农游”合一特殊性质的农业旅游正在进入规模化发展的新时期[7],在这一背景下,烟台市应重视境内颇具潜力的农业旅游资源,以突出和丰富自己的旅游形象定位。同时,随着环渤海经济圈的开发建设和《山东半岛蓝色经济区发展规划》等利好政策的影响,加之旅游业发展过程中存在的问题和不足日渐得到相关部门的重视并加以改善,烟台市的旅游业发展势必有着很大的提升空间。基于此,本文介绍了烟台市旅游业的发展现状,分析了发展过程中存在的问题,最后提出了几点对策,以期为烟台市旅游业的可持续发展提供决策支持和参考。     

Evaluation of pinnacle reef distribution at shallow subsurface using integrated geophysical methods: A case study from the upper Kimmeridgian (Spain)

The well exposed outcrops of the upper Kimmeridgian shallow-marine carbonates at Jabaloyas (Iberian Chain, NE Spain) permit the evaluation of geophysical methods for the identification of sedimentary facies. Direct measurement of magnetic susceptibility in facies and detailed grids of magnetometry, electromagnetic multifrequency and ground-penetrating radar (50–500 MHz antennas) have been performed in two study areas where the upper Kimmeridgian rocks are nearly horizontal. Magnetometry indicates negative anomalies in residual magnetic field and vertical magnetic gradient related to reef pinnacles and faults. Electromagnetic data reveal that positive anomalies of apparent conductivity correlate with non-reefal facies. The areal distribution of magnetometry and EM data does not permit the unequivocal identification of pinnacles and faults at the studied area. By contrast, ground penetrating radar profiles and maps of relative reflectivity in two way travel time slices are useful for the identification of faults (hyperbolic anomalies) and reefal and non-reefal facies (radar facies A and B, respectively). The integration of geophysical data, mainly ground penetrating radar, has permitted the 3D reconstruction of reef pinnacles and its tectonic framework.     

石油类污染水体后向散射特性分析——以辽宁省盘锦市双台子河和绕阳河为例

水体悬浮物对溶解在水中的油及乳化油有吸附作用,这种作用会叠加在颗粒物上,对水体的后向散射系数产生影响,而水体后向散射系数是水色遥感的重要参数之一,对建立遥感反演石油类污染浓度半分析模型起着关键性的作用。根据2008年5月在辽宁省盘锦市辽河油田境内双台子河和绕阳河现场测定的水样,对水体组分进行浓度分析,并分别利用分光光度计及后向散射系数测量仪测定水色三要素的吸收系数和水体后向散射系数。根据获取的数据,对石油类污染水体后向散射特性进行分析,分别建立了(1)石油类污染水体后向散射系数光谱模型;(2)石油类污染水体和非石油类污染水体后向散射系数与无机悬浮物浓度的关系模型。研究结果表明:(1)在建立的后向散射系数光谱模型中,幂函数指数平均值为0.87;(2)从相关系数分析来看,对后向散射系数起主要作用的是无机悬浮物浓度,其次是石油类物质浓度,而有机悬浮物浓度几乎没有影响;(3)对于无石油类污染水体,后向散射系数与无机悬浮物浓度为对数关系模型,而与有石油类污染水体更接近线性关系模型。     

元素地球化学在新区古环境重建中的应用

应用元素地球化学方法对珠江口盆地珠一坳陷东北部韩江凹陷新钻井H4开展了系统分析研究,在其元素地球化学分析结果的基础上,重点对韩江15洼沉积古环境进行了详细分析,初步探讨和阐明了韩江15洼始新世沉积环境及其纵向演化过程,并获得了以下重要成果与认识：①重建了韩江15洼始新统古水深、氧化还原条件、古气候、古盐度的演化历史;②韩江15洼始新统沉积期主要以浅水环境为主,水体富氧,但文昌组三段水体加深,以弱氧化环境为主;③文昌组沉积期气候偏干,进入恩平期气候向湿润转变;④韩江15洼文昌期受东南方向海侵影响,水体盐度增高,但恩平期未受海侵影响,以淡水环境为主;⑤根据元素地球化学判别结果、测井相及岩性特征,综合判识韩江15洼始新统文昌组上段（H4探井附近区域）主要为浅水三角洲沉积。上述研究成果及认识,对于深化韩江凹陷始新世沉积环境的认识及海侵影响分析等均具有一定的指导及参考意义。     

Detection of fluvial sand systems using seismic attributes and continuous wavelet transform spectral decomposition: case study from the Gulf of Thailand

Fluvial sands host excellent oil and gas reservoirs in various fields throughout the world. However, the lateral heterogeneity of reservoir properties within these reservoirs can be significant and determining the distribution of good reservoirs is a challenge. This study attempts to predict sand distribution within fluvial depositional systems by applying the Continuous Wavelet Transformation technique of spectral decomposition along with full spectrum seismic attributes, to a 3D seismic data set in the Pattani Basin, Gulf of Thailand. Full spectrum seismic attributes such as root mean square and coherency help to effectively map fluvial systems down to certain depth below which imaging is difficult in the intervals of interest in this study. However, continuous wavelet transform used in conjunction with other attributes by applying visualization techniques of transparency and RGB can be used at greater depths to extract from 3D seismic data useful information of fluvial depositional elements. This workflow may help to identify different reservoir compartments within the fluvial systems of the Gulf of Thailand.