Erosion Problems Research Articles

Assessment of human interventions presence and their impact on shoreline changes along Nile delta, Egypt

Coastal erosion is a natural process, that contributed to shaping the Nile Delta shoreline in Egypt over history. The objective of this research is to investigate shoreline changes, accretion, and erosion and to detect particularly vulnerable locations that require immediate attention. Another goal is to assess the efficiency of coastal installations that have been recently implemented along the study area and determine whether they have performed their role to the fullest or need additional modifications. Several Landsat images (TM, ETM+, and OLI) were utilized over 37 years to track the shoreline changes and were analysed using remote sensing (RS) and Geographic Information System (GIS). The digital shoreline analysis system (DSAS) was integrated with the LRR model for assessing historical changes for shorelines from 1985 to 2022 and forecasting future shoreline positions in 2030, 2050, and 2100. Most of the eight zones that make up the Delta region have lately seen the establishment of coastal projects, such as the development of the Abu Qir port's breakwater in 2021. From the results, it was found that the areas around Rosetta promontory, Burullus headland, and Damietta promontory experienced a significant and rapid retreat and with large rates over the study period, with average values of –15.7, –3.25, and –16.8 m/y, respectively. However, both the coast of Alexandria, and Gamasa embayment were subjected to accretion as a prevailing case, with average rates of 2.85, and 4.03 m/y, respectively. Many groins were installed in the east of the Rosetta promontory (zone 3) in 2016 to decrease the erosion process; however, it didn't pay off and could not solve the problem. In contrast, the groins system, which was implemented at the East Kitchener Drain (zone 5) in the same year, lowered erosion rates from 17.6 m/y from 2000 to 2010 to 7 m/y from 2010 to 2022. In 2019, Y-groins built in zone 7, east of Damietta Port, succeeded in slowing rates of erosion. Finally, inlet jetties at El-Gamil (zone 8) were constructed in 2016, resulting in the coastline advancing at 14.7 m/y on average in the period of 2010–2022. The findings of this study confirmed that hard structures are dangerous because they exacerbate the problem of shoreline erosion by disseminating it to the neighbouring beaches and acting as an impediment to the movement of longshore sediments. According to the expected future shoreline patterns, it is necessary for authorities to implement both short-term and long-term protective measures to stop the erosion of several areas of the beach.

Mechanism of microbial inhibition of rainfall erosion in black soil area, as a soil structure builder

Rainfall-driven erosion is a primary cause of land degradation in Northeast China. Soil microorganisms, drivers of agricultural ecosystems, have been applied to address soil erosion problems, but the microorganism types studied are limited, and mechanisms of rainfall erosion inhibition by other soil microorganisms are unclear. Herein, soil microorganisms were inoculated on a black soil surface, under three water content (16.5%, 20%, 24.8%), three slope gradients (3°, 6°, 9°), and one rainfall intensity (80 mm/h) condition, the soil microbial community effects on rainfall erosion and soil surface nutrients were systematically studied. Results showed that the soil surface structure changed with microbial growth and proliferation; the proportion of large- and medium-sized aggregates in microorganism-treated groups was 27.51% higher than that in control groups in average. Additionally, the microbial community enhanced soil surface erosion resistance. After two rainfall events, compared to control groups, soil loss and runoff in the microbe-treated groups decreased by averages of 93.72% and 68.88%, respectively. Due to microbial action, sloped areas maintained slow-flow states, reducing concentrated flow and weakening sediment transport by runoff. Furthermore, the organic matter content of microbe-treated groups was on average 17.69% higher than that of control groups, indicating that microorganisms have a strong ability to remediate soil nutrient, delay declines in organic matter, and restore surface organic matter in the soil. Overall, microbial inoculation of surface soil is a practical and effective method for controlling rainfall erosion. This presents a new direction in the field of soil and water conservation for the future and provides a theoretical basis and technical support for using microorganisms to protect land ecosystems.

Best management practices to reduce soil erosion and change water balance components in watersheds under grain and dairy production

Soil erosion and sedimentation are among the most serious global environmental problems. Soil and water conservation measures have been proven effective ways to reduce soil loss. The objective of this study was to evaluate the impact of three approaches of soil and water conservation measures (soil management, vegetative measures, and structural practices) on soil erosion and water balance of two paired agricultural watersheds located in Southern Brazil. Streamflow and sediment monitoring was carried out from 2016 to 2019 in the two small paired agricultural watersheds; called North watershed (NW) and South watershed (SW). Modeling using Soil & Water Assessment Tool (SWAT) was performed to simulate individual (nine scenarios) and combined (four scenarios) best management practices (BMPs), by including the three approaches. Among the nine individual BMP scenarios, the most effective in reducing soil erosion was crop rotation and cover crop (sediment yield, SY, reduction of 38.4 for NW, and 28.8% for SW). Among the four combined scenarios, the association of all conservation approaches was the most effective in reducing soil erosion (SY reduction of 46 for NW, and 41.5% for SW), followed by the vegetative measures scenario (SY reduction of 43.5 and 34.1% for NW and SW). All combined scenarios increased infiltration and subsurface water components, and decreased surface runoff. The findings of this study can help farmers and policymakers choosing appropriate BMPs to reduce current soil erosion problems and promote water and soil conservation.

Evaluation and prediction of water conservation of the Yellow river basin in Sichuan Province, China, based on Google Earth Engine and CA-Markov

The Yellow River Basin in China has the world's most serious soil erosion problem. The Yellow River Basin in Sichuan Province (YRS), as the upper reaches of the Yellow River, and its water conservation (WC) capacity greatly affects the ecological environment of the downstream basin. In recent years, YRS has received more and more attention, and numerous policies have been developed to improve local WC. However, there is a vacancy in the long-term research of WC in the YRS due to the lack of in-situ data. This study quantitatively evaluated the WC of YRS from 2001 to 2020 through Google Earth Engine (GEE) and analyzed the spatio-temporal variations of WC and land cover (LC). CA-Markov predicted the LC and WC in 2025 under three scenarios to assess the contribution of different scenarios to WC. The WC in YRS fluctuated from 1.93 to 6.77 billion m3. The climate is the dominant factor of WC change, but the effect of LC on WC is also evident. The WC capacity increases with vegetation coverage and height. The WC capacity of forests per km2 exceeds 600 mm, while that of grasslands is about 250 mm, and barren can cause around 300 mm of WC loss. In 2025, the WC in YRS may exceed 7.5 billion m3, but the past ecological management mode should be transformed. Improving the quality of land use and converting grasslands to forests is better than reducing cropland to improve WC.

ERODIBILITY INDICES UNDER DIFFERENT LAND USES IN AWKA, NIGERIA

Erosion problems are on the increase, worldwide, especially in the Southeastern part of Nigeria, where this problem is becoming uncontrollable. In this study, erodibility indices were studied in Nnamdi Azikiwe University, Awka, Anambra State Nigeria under four land uses (cultivated land, fallow land, bush and bare land). The land uses are located in the Agricultural and Bioresources Engineering Farm Workshop, apart from the bush, which is located close to the farm workshop. Soil samples were collected from each of the land uses at 0-25cm depth using soil auger. The soil samples were taken to the laboratory for determination of %silt, %clay, %sand and organic matter content. Soil structure, permeability, clay ratio (CR), modified clay ratio (MCR), critical level of organic matter (CLOM) and erodibility (K) index were also determined. From the result. %sand and % silt had negative correlation with k index, while % clay and organic matter content has positive correlations. The average CR and MCR obtained were 2.303 and 1.98 respectively, while CLOM of soil obtained in all the land uses were less than 5%. The result of the CLOM indicates poor soil structure and high susceptibility of erosion, while conclusion could not be drawn from CR and MCR.

EVALUASI PROGRAM FLOOD MANAGEMENT IN SELECTED RIVER BASINS DI KABUPATEN PANDEGLANG

The problem of flooding and erosion is a natural phenomenon that greatly affects the community. Losses resulting from these events can reduce the quality of human life in various aspects of life. So there is a need for immediate management with various strategies. One of them is the Evaluation of the Flood Management in Selected River Basins Program in Pandeglang Regency. The purpose of this study was to evaluate the Farmland Management and Sustainable Agriculture Practices for Flood Management in Selected River Basins program Sector Project Pandeglang with the perspective of the CIPP evaluation model (Context, Input, Process, Product) and to recommend sustainability strategies. The research was conducted using a descriptive method with a qualitative approach. The results showed that the existence of the FMSRB program was able to answer various problems with critical lands and flood risk. Then the most effective continuation strategy that must be carried out is carried out by the Pandeglang Regency government with a Collaborative Governance strategy, namely collaboration between the Regency government and the private sector, universities/academics, and so on. The conclusion of the research is that the CIPP evaluation model can answer the main causes of flooding in the Pandeglang Regency.

Meshfree modeling of brittle surface erosion by sharp-angled particle impact with Johnson–Holmquist-II(JH-2) model

A SPH model is established, combined with JH-2 model for solving brittle surface erosion problems, which is validated by impact experiments. Simulations are conducted by varying particle incident parameters. Results show that crack formation is affected by impact angle αi, initial orientation θi, and impact velocity Vi. While crack propagation direction is mainly dominated by θi. Surface fragmentation caused by lateral cracks can greatly increase brittle surface erosion, which is most likely to occur at θi= +30°. Without surface fragmentation, a critical orientation angle exists. Secondary impact is also a critical factor for surface erosion and determined by θi. Particles with smaller θi tend to roll on the surface, whereas larger θi particles are more likely to bounce off the surface.

Impact of resonant magnetic perturbation on blob motion and structure using a gas puff imaging diagnostic on the HL-2A tokamak

The impact of resonant magnetic perturbation (RMP) on blob motion and structure in the SOL of the HL-2A tokamak is studied using a gas puff imaging diagnostic. Ellipse fitting is applied to study the structure and motion of blobs quantitatively. The radial locations, amplitudes and scale sizes of blobs are obtained based on the fitted ellipse. Furthermore, based on the measurement of blob location, the radial and poloidal velocities of blobs are calculated. With the application of RMP, the edge poloidal shear flow is significantly weakened and the wave number spectrum changes from quasisymmetric to significantly up-down asymmetric. The application of RMP also causes the detected blob location to be much further into the far scrape-off layer (SOL) and increases the blob amplitude. Blob poloidal velocity in the SOL is slowed. Larger-size and longer-lifetime blobs are observed with RMP. With the application of RMP, stronger-amplitude and larger-size blobs are detected in the far SOL and they may cause a more serious erosion problem to the first wall.

Impacts of climate change and human activities on vegetation coverage variation in mountainous and hilly areas in Central South of Shandong Province based on tree-ring.

It is of great significance to understand the characteristics and influencing factors of vegetation coverage variation in the warm temperate zone. As a typical region of the warm temperate zone in eastern China, the mountainous and hilly region in central-south Shandong Province has fragile ecological environment and soil erosion problem. Studying on vegetation dynamics and its influencing factors in this region will help to better understand the relationship between climate change and vegetation cover change in the warm temperate zone of eastern China, and the influence of human activities on vegetation cover dynamics. Based on dendrochronology, a standard tree-ring width chronology was established in the mountainous and hilly region of central-south Shandong Province, and the vegetation coverage from 1905 to 2020 was reconstructed to reveal the dynamic change characteristics of vegetation cover in this region. Secondly, the influence of climate factors and human activities on the dynamic change of vegetation cover was discussed through correlation analysis and residual analysis. In the reconstructed sequence, 23 years had high vegetation coverage and 15 years had low vegetation coverage. After low-pass filtering, the vegetation coverage of 1911-1913, 1945-1951, 1958-1962, 1994-1996, and 2007-2011 was relatively high, while the vegetation coverage of 1925-1927, 1936-1942, 2001-2003, and 2019-2020 was relatively low. Although precipitation determined the variation of vegetation coverage in this study area, the impacts of human activities on the change of vegetation coverage in the past decades cannot be ignored. With the development of social economy and the acceleration of urbanization, the vegetation coverage declined. Since the beginning of the 21st century, ecological projects such as Grain-for-Green have increased the vegetation coverage.

Soil Erosion in Northern Nigeria: Potential Impact and Possible Solution: A Review

Aim: This research aims to discuss the environmental soil erosion problem in northern Nigeria: their potential impact and possible solution for sustainable agriculture and livelihood management
 Methods: This research was carried out by reviewing the literature. The data were derived from; books, journals, internet and conference reports, and Google Scholar, and some university library catalog was used to search the literature. The search terms used are soil erosion, climate change, land degradation, Sahel, drylands, soil conservation, agroforestry, and sustainable land management.
 Results: This paper reviewed environmental problems such as soil erosion which are generally considered as the most serious consequences and their impact will remain the main issues for the 21st century. Soil loss will however be prevented or decreased by appropriate crop management such as cover cropping, multiple cropping, and high-density planting. Cover crops have certainly influenced the properties of physical soil which include infiltration rate, moisture content, bulk density, increase organic matter content, the levels of Nitrogen (N) by use of Nitrate (N2) fixing legumes, exchange of cation capacity and crop yields.
 Conclusion: The use of cover crops, multiple cropping, agroforestry, and conservation tillage are provided as some of the effective means of controlling soil erosion in the northern part of Nigeria. Therefore, the recommendation here is that the government extension services should incorporate farmers in the affected areas.

Mechanical and Thermoanalytical Study of Polypropylene Geomats Exposed in the Field and the Laboratory.

A Hydroelectric Power Plant (HPP) presents erosion problems on reservoir slopes and margins. Geomats are a biotechnical composite technology increasingly used to protect soils against erosion. Survivability or durability of geomats is essential for successful application. This work analyses the degradation of geomats exposed in the field for more than six years. These geomats were used as erosion-control treatment in a slope at HPP Simplício in Brazil. The degradation of the geomats in the laboratory was also analysed through exposure in a UV ageing chamber for 500 h and 1000 h. Degradation was quantitatively evaluated by testing the tensile strength of the geomat wires and thermal tests such as thermogravimetry (TG) and differential scanning calorimetry (DSC). The results showed that the geomat wires exposed in the field had a greater decrease in resistance compared to the samples exposed in the laboratory. In the samples collected in the field, it could be observed that the degradation of the virgin sample occurred earlier than in the exposed samples, contrary to what was observed in the TG tests carried out with the samples exposed in the laboratory. The DSC analysis showed that the samples had similar behaviours for the melting peaks. This evaluation of the wires of the geomats was presented as an alternative to analysing the tensile strengths of discontinuous geosynthetic materials such as the geomats.

Study on erosion-reducing additives and erosion inhibition principle for R2 high energy propellant

In view of the serious erosion problem of the gun barrel with the R2 high-energy propellant, an erosion tube device method was adopted, and silane organic substances, silicate inorganic substances, titanium dioxide nanoparticles and paraffin wax were selected as erosion-reducing additives. The effect of different erosion-reducing additives on the erosive property of R2 propellant was investigated by means of external addition. The erosion inhibition principle was also briefly investigated by scanning electron microscope and energy dispersive X-ray spectroscopy. The results show that paraffin wax has excellent ability to improve gun barrel erosion resistance, the erosion-reducing efficiency can reach up to 31.2%, the erosion-reducing efficiency of silanes is the next most effective, and silicate is poor.

Ignoring environmental change? On fishing quotas and collapsing coastlines in Bykovskiy, Northern Sakha (Yakutiya)

The Indigenous village of Bykovskiy is located 40 km from Tiksi, the administrative center of Bulunskiy District (Ulus), in the northern part of the Republic of Sakha (Yakutiya), Russia. Founded as a Soviet fishing cooperative, it became home to Indigenous Sakha, Evenkis, Evens, as well as to Russian settlers and political prisoners from the Baltic states. Post-Soviet transformations, coupled with escalating environmental change processes, has been altering the local economy and subsistence activities since the 1990s. Although our interlocutors directly observed and experienced such changes, they seemed to ignore the visible problem of severe coastal erosion that was destroying a local cemetery. This article is based on ethnographic fieldwork conducted in the study region in 2019, and combines approaches from the anthropology of climate change with reception and communication studies. It examines “ignorance” as a strategy of adaptation to multiple stressors under historically reproduced colonial structures of governance.

(414) Double Distal Fixation Stitch

Abstract Introduction Distal cylinder extrusion is not a common complication of penile prothesis surgery when compared to mechanical device failure but can have very serious complications if not addressed properly. Reported revision surgery for IPP implantation is more commonly required for cosmetic and erosion problems as opposed to mechanical failure. Complications such as distal crossovers, delayed distal crossovers, and impending lateral extrusion can be treated with a double distal fixation stitch. This technique addresses stabilization issues and keeps penile implant secure and in place. Objective We demonstrate the Double Distal Fixation Stitch for the meandering distal cylinder Methods 62 y/o white male Hx of erectile dysfunction and Penile implant No significant past medical history Presents with pending left lateral cylinder extrusion Implant functional Patient underwent a corporoplasty and double distal fixation stich in order to ensure distal aspect of cylinder remains in place Results A lateral sub-coronal incision is used on the affected side where cylinder should be positioned. Dissection is carried through the Buck fascia, followed by a transverse incision of the tunica albuginea, where the distal aspect of the affected cylinder is delivered. Two 2-0 Ethibon sutures are threaded through the distal cylinder islet of the implant. A new, properly positioned intracorporal channel is created using a longitudinal capsulotomy and dilation with a 9 Hagar. Two 2-0 Ethibon sutures are passed through the distal islet of the implant cylinder. The first suture is passed through the glans with the cylinder in the native corpora position, a second suture is passed through about .25cm apart from first suture creating a small bridge. A small incision is made connecting the two suture exit sites. Both sutures are then tied down individually leaving one suture on each side to be tied across the bridge. The knots are then buried in the glans by elevating the skin and closing the skin with 3-0 chromic. Conclusions This technique ensured that the cylinder remained in the newly created, appropriately positioned channel. The double distal fixation stitch is safe and effective in securing the distal cylinder of an inflatable penile prosthesis and preventing recurrence. This technique is a useful surgical adjunct to treating patients with prosthetic lateral extrusions or crossovers that can be applied in almost all cases and can ensure distal stabilization of a migrating distal cylinder in weak tunica. Disclosure Any of the authors act as a consultant, employee or shareholder of an industry for: coloplast, boston scientific.

Vanilla planifolia Andrews (Orchidaceae): Labellum Variation and Potential Distribution in Hidalgo, Mexico

Vanilla planifolia is a species of commercial importance. However, vanilla presents gene erosion problems due to its clonal reproduction. In the Huasteca of Hidalgo, there is no information on vanilla populations. Therefore, the objectives of this study were to identify the current populations and the potential distribution of, and the morphological variation in, the labellum of V. planifolia in the Huasteca of Hidalgo. Twenty-two accessions were located and selected. Based on 21 environmental variables, the niche modeling of the potential distribution was carried out with the MaxEnt program; with the Jackknife test being used to identify the variables that contributed to the model. Flowers from 22 accessions were collected and the labellum of each flower was dissected. Subsequently, 64 morphological variables were obtained and various multivariate analyses were performed. The results showed three regions, defined by the highest to the lowest probability that V. planifolia was distributed. The precipitation of the driest month, altitude, and vegetation cover delimited the distribution. Five different morphotypes were distinguished, and the main differences were associated with the middle part of the labellum as well as the entrance of pollinators to the flower; therefore, the characterization of the labellum showed an infraspecific variation in V. planifolia in populations of the Huasteca of Hidalgo.

Soil Water Erosion and Its Hydrodynamic Characteristics in Degraded Bald Patches of Alpine Meadows in the Yellow River Source Area, Western China

Degraded bald patches have been active influencing factors in recent years, leading to meadow degradation and soil erosion in the Yellow River source area. In this study, we aimed to quantify the soil water erosion patterns and the hydrodynamic characteristics of degraded bald patches under different vegetation coverage (10%, 30%, 50%, 70% and 90%) and slope (10°, 20° and 30°) combination treatments through simulated rainfall experiments, and to investigate the influence of rodent activities on meadow degradation and soil erosion using zokor mound bare ground as a control. The results show that rodent activity exacerbates erosion problems and that soil erosion rates are negatively correlated with the degree of meadow degradation as an exponential function (p < 0.01). All slope flows are laminar; Reynolds and Froude numbers decrease as a function of vegetation coverage exponentially and linearly (p < 0.01), respectively, and are positively correlated with slope. Flow resistance increases with increasing vegetation coverage and decreasing slope, and vegetation coverage and slope are significant factors affecting flow resistance (p < 0.05). Runoff shear stress was found to range from 1.71 to 5.27 N m−2 in the study area and is positively correlated with vegetation coverage and slope, with a much greater influence of slope than vegetation coverage (p < 0.05). Based on the Pearson correlation and grey correlation method analysis, we concluded that runoff rate, flow velocity, Reynolds number and the Froude number can all describe the hydraulic erosion state under the action of soil erosion on slopes. The Reynolds number was tentatively judged to be the best hydrodynamic parameter to describe the soil erosion process. We conclude that developing degraded bald patches reduces flow resistance and increases surface runoff capacity and soil erodibility by reducing vegetation coverage. The reasonable control of rodent activity can effectively combat erosion on degraded bald patches.

Morphological and elemental analysis of termite mound and ant nest in agriculturally prominent area

Soil management is important for the farmers to improve the crop yield. In nature some invertebrates serve as bioindicators and biomonitors. Biogenic structure built by insects is important for controlling soil erosion and water reserves. Ants and termites nest architecture along with the elemental analysis was studied to evaluate soil health and possible threats imposed by heavy metals in the area. The soil samples were collected and analyzed for various parameters. Systematic study of porosity, composition, and nutritional values of soil in ant nest and termite mound were done. The Atomic Absorption Spectrophotometer and Inductively Coupled Plasma Mass Spectrophotometer studies showed that ant nest and termite mound samples were found to contain elements viz., zinc, selenium, lead, cadmium, nickel drought and chromium. Based on Scanning Electron Microscope-Energy Dispersive Analysis of X-rays, the size of soil samples collected from ant nest and termite were found to be 27.77 nm and 25.56 nm, respectively. The corrosion resistant zirconium and titanium metals were detected in 0.68 and 0.39% concentration in ant nest and termite mound samples, respectively, representing the insect house as a possible source of rich metals. The ant nest and termite mound materials contain quartz, microcline, kaolinite, and clay minerals. Ant nests and termite mounds can thus be used as hydrological indicators to address the problems of soil erosion.

Facial Expression Recognition with Contrastive Learning and Uncertainty-Guided Relabeling

Facial expression recognition (FER) plays a vital role in the field of human-computer interaction. To achieve automatic FER, various approaches based on deep learning (DL) have been presented. However, most of them lack for the extraction of discriminative expression semantic information and suffer from the problem of annotation ambiguity. In this paper, we propose an elaborately designed end-to-end recognition network with contrastive learning and uncertainty-guided relabeling, to recognize facial expressions efficiently and accurately, as well as to alleviate the impact of annotation ambiguity. Specifically, a supervised contrastive loss (SCL) is introduced to promote inter-class separability and intra-class compactness, thus helping the network extract fine-grained discriminative expression features. As for the annotation ambiguity problem, we present an uncertainty estimation-based relabeling module (UERM) to estimate the uncertainty of each sample and relabel the unreliable ones. In addition, to deal with the padding erosion problem, we embed an amending representation module (ARM) into the recognition network. Experimental results on three public benchmarks demonstrate that our proposed method facilitates the recognition performance remarkably with 90.91% on RAF-DB, 88.59% on FERPlus and 61.00% on AffectNet, outperforming current state-of-the-art (SOTA) FER methods. Code will be available at http//github.com/xiaohu-run/fer_supCon .

Call for joint international actions to improve scientific understanding and address soil erosion and riverine sediment issues in mountainous regions

During the International Workshop on Soil Erosion and Riverine Sediment in Mountainous Regions held in November 2022, scientists from many countries shared their state-of-the-art knowledge and brainstormed to improve scientific understanding for coping with climate change and anthropogenic impacts. Information summarized in this discussion includes proposed key scientific questions and suggested joint actions to reduce soil erosion and riverine sediment problems in mountainous regions.

Coastal erosion and accretion on the Caribbean coastline of Costa Rica long-term observations

Several studies show erosive processes on the Caribbean coastline of Costa Rica. These processes may be accelerated as a result of an increase in the sea level. This study covered the entire Caribbean coastline of Costa Rica between 1986 and 2019. This allowed reporting new sites with accelerated coastal accretion and erosion processes, as well as confirming other processes that have already been identified. The methodology was based on shoreline rising images obtained from Landsat and on their processing in a Geographical Information System supported with the “Digital Shoreline Analysis System” (DSAS) tool. The presence of important accretion areas related to the mouth of significant fluvial systems, such as Colorado, Parismina, Matina, Estrella, and Sixaola rivers is highlighted. Moreover, eight beach sectors showing erosion problems have been analyzed. The beach located to the south of Isla Portillos and beaches located on Cahuita Point stand out due to their intensity. Additionally, an intense beach erosion process has been detected at Soropta in Panamá. It should be highlighted that six of the eight sites showing erosion are located within protected zones. This confirms the little anthropic interference on these processes. It was not possible to find a difference between the north and the south of the Caribbean Coast in terms of the magnitude of coastal erosion. The contribution of the rivers is a key factor in the North Caribbean while the responses to the 1991 earthquake conditioned the behavior on the South coast. The results may serve as a basis for management plans or adaptation to climate change proposals.