Reclamation Area Research Articles

Research Progress of Soil and Vegetation Restoration Technology in Open-Pit Coal Mine: A Review

Open-pit mining has caused extensive land destruction, including land abandonment and reduction in agricultural land, resulting in serious environmental problems. Ecological restoration and mine reclamation have become important components of the sustainable development strategies in Inner Mongolia, China. Therefore, the rehabilitation of mines and agricultural land is vital and has attracted widespread attention from the Chinese government. In this light, we reviewed the progress of mine restoration technologies in China in recent years and summarized the integrated technology of open-pit mine reclamation with microbial restoration technology as the core, ecological vegetation restoration as the essential, and soil restoration and improvement as the promotion. As a cost-effective and environmentally beneficial technique, combining the microbial recovery technology with vegetation and the recovery of vegetation and the improvement of the soil is widely recommended in the mining reclamation area. At the same time, we comprehensively analyzed the current status and progress of ecological restoration technology and put forward the development direction of green mining in the future. In conclusion, this review can provides guiding the sustainable development of green, ecological mines, as well as provide reference for mining reclamation and agricultural land restoration and other related fields.

Effect of dung and dung beetle application on topsoil fungal assemblage of a post-coal mining reclamation land: Towards soil health improvement

Soil management practices such as organic matter input can ameliorate soil health, including microbial communities that are crucial for ecological processes. In this study, the effect of successive application of cattle dung and/or dung beetle on the diversity and ecological guild of topsoil fungal assemblages on a post-coal mining reclaimed site was investigated. Three experimental treatments namely: dung plus dung beetles (dung + beetle), dung only (dung-only), and no dung, no dung beetle (control) was established on 4-m2 subplots on a ≥16-year-old post-coal mining reclamation area. Following a 17-month experimental period, topsoil fungal assemblage was determined using next-generation sequencing of fungal ribosomal internally transcribed spacer 2 region. The highest operational taxonomic unit (OTU) richness and Shannon-Wiener diversity were obtained in the dung-only treatment while the lowest OTU richness and diversity was obtained in control treatment. Although not statistically significant, a trend towards lower OTU richness in the topsoil was observed with the addition of dung beetle compared to the only dung treatment. In multivariate space, fungal communities were differentiated between dung-only and control, suggesting the influence of dung addition. Overall, dung addition primarily improved topsoil fungal diversity and the abundance of beneficial plant-fungal symbionts important for nutrient mobilisation in the soil, with a trend towards lower diversity observed with dung beetle addition suggesting possible vertical displacement of organic matter and ecologically relevant fungal species to deeper soil depths.

Impact of marshy area reclamation by various vegetations on soil-nematode community structure in Dachigam National Park

• Impact of marshy area reclamation by various vegetations on soil nematode community was investigated.• Nematode abundance was lowered by reclamation mostly due to bacterivores.• Reclamation effectively diminished the nematode metabolic footprint.• Robust management strategies must be adapted for conservation and protection of marshy ecosystems.Marshy areas are ecologically important and sensitive areas which are under immense pressure, such as reclamation by various terrestrial vegetations. However, how these vegetation types disrupt the stability of nematode community is scarce. The present study determined how the soil nematode community responded to shifting environmental states by using nematode abundances, nematode indices and metabolic footprints as indicators. In this context, we selected three types of reclaimed vegetation around a marshy land (MR) in Dachigam National Park, Kashmir, which includes grassland (GL), forest (FR) and cropland (CL) to investigate the soil nematode community. Acrobeloides, Plectus, Eudorylaimus, and Aphelenchus proved more sensitive to reclamation effect. Results revealed decrease in total nematode and bacterivore abundance. Reclamation reduced diversity in CL, whereas no effect was observed in the GL and FR as compared to MR. Channel index indicated shift from fungal decomposition to bacterial decomposition pathway in GL. The nematode faunal profile depicted grassland (GL) as the most structured ecosystem compared to MR, FR, and CL. Our results suggest that vegetation type regulates the structure, function, and stability of the soil food web, which has significant implications for managing the vegetation cover in a sustainable manner in the Dachigam National Park.

VALIDAÇÃO DO PROGRAMA DE ENFERMAGEM DE REABILITAÇÃO TECNOLÓGICO PARA PESSOAS SUBMETIDAS A ARTROPLASTIA DO JOELHO

ABSTRACT Objective: to validate a Technological Rehabilitation Nursing Program for people undergoing total knee arthroplasty. Methods: this is a qualitative study, carried out through a focus group, with 12 nurses, considered experts in the area of rehabilitation. The program was developed using digital technology, such as an application for a mobile device. Experts assessed the program structure, the content made available to people undergoing total knee arthroplasty pre-operatively and post-operatively and the follow-up and communication strategies with nurses. Results: after content validity by experts, the final version of the program integrated three thematic areas and their respective categories: Rehabilitation program (Program phases, Program operationalization, Exercise plans included in the program); Useful information (Preparation for surgery, Care to be taken during surgery recovery); and Communication channel with nurses (Talk to a rehabilitation nurse, Self-assessment of health condition and Help with decision-making). Conclusion: experts’ contributions made it possible to achieve the content validity of the program and, consequently, improve patient literacy about the procedure, complication prevention and self-care; training patients to carry out exercise plans in the pre- and post-operative periods; and communication with nurses through application.

Diversity and Succession of Perennial Trees in the Rehabilitation Areas of a Limestone Mine, Saraburi Province, Thailand

This study aimed to investigate the structure and composition of plant community to i) identify tree species that can colonize, grow, and form communities and ii) identify species under natural succession whose seedlings can be used in forest rehabilitation. Experimental plots of size 40 m × 40 m were established in 13-, 10-, and 5-year-old rehabilitation areas (13YRA, 10YRA, and 5YRA), where characterized as flatted, sloped, and benched areas, respectively. The survey found 24 genera, 12 families, and 25 species of plants. Plant species that were found in all plots were Zollingeria dongnaiensis Pierre., Pterocarpus macrocarpus Kurz., Albizia lebbek (L.) Benth., and Azadirachta indica A. Juss.) which can potentially grow well in several conditions of post-mining areas. The 13YRA plot had the most significant number of naturally regenerating species (11 species) as the area was next to a natural forest or buffer zone and had been under restoration for the most prolonged period. The community succession of the rehabilitation plots relative to the natural forest was relatively slow. Nonetheless, the pioneer species can help to improve the environmental factors to optimum levels for the natural succession of the plant community. This can also be useful while selecting pioneer species for restoring areas previously used for limestone mining and help reduce the time for succession in terms of increasing the species composition.

Soil carbon stock in different of mangrove ecosystem in Mahakam Delta, East Kalimantan, Indonesia

Mangrove forests serve as a buffer against sedimentation from the mainland into the sea, protect the area from coastal erosion, and prevent seawater intrusion in some ecological types of coastal environments. Additionally, because soil and below-ground biomass retain a significant quantity of carbon, they are essential for carbon sequestration. The current study seeks to estimate the soil organic carbon stock of mangroves associated with natural regeneration, mangrove rehabilitation areas and abandoned shrimp ponds, in Mahakam Delta, East Kalimantan, Indonesia. A 125-meter-long transect line was used to collect data, with three sampling points representing the length of the transect line. Each soil sample was taken at three different depths: 0-50 cm, 50-100 cm, and 100-150 cm. After that, the samples were taken to the laboratory for carbon analysis. The mangrove rehabilitation area had the highest bulk density at 8.64 gr/cm3, followed by natural mangroves along the river border at 7.67 gr/cm3, and abandoned ponds had the lowest at 7.16 gr/cm3. The rehabilitation area had the highest soil carbon stock at 1120 tons/ha, followed by natural mangroves along the riverside at 686 tons/ha and abandoned ponds at 383 tons/ha. In accordance with the study, mangrove rehabilitation regions had larger soil carbon stocks than natural regeneration along the riverside and abandoned ponds. In order to protect the ecologically significant mangrove ecosystem and minimize the effects of climate change, mangrove restoration and rehabilitation are necessary.

Mechanization Status, its Technical Indicators and Impact on the Wheat Crop Production in Iraq

Abstract Increase of the number of tractors and harvesters working in agriculture improves significantly the number of agricultural land operations, harvest efficiency and eliminates primitive farming methods. The production expansion is either horizontal through exploitation and reclamation of more areas or vertical such as introduction of technological variables in the same unit area. The current study aims to investigate the gap of the ratio of the number of tractors and harvesters to the agricultural area, its technical indicators and its impact on the wheat crop production. Data were obtained from agricultural departments and divisions of the Salah al-Din Agriculture Directorate to calculate some of the indicators of the technological and technical evaluation. Tables were prepared with the numbers of tractors and agricultural harvesters that cover the cultivation and harvest campaign. Their horsepower was proven and then converted to the kilowatt unit, as well as the agricultural areas within the agricultural plan that is implemented by the Directorate for four seasons. The surplus power of agricultural tractors contributed to the increase in the executed agricultural areas and requirements of agricultural operations such as tillage, harrows, and leveling contrary to agricultural harvesters, in which case there was a gap in the decrease of the number of agricultural combines in relation to the implemented agricultural plan, which, as a result, may cause a loss in wheat crop harvesting on the specified date. The mechanical harvest contributed to the increase in the grain received from the wheat by the grain trading company in the province, which brings economic returns to the farmer.

Development and evaluation of face and content validity of a survey to examine wound management by occupational therapists in hand therapy practice within the South African context

BACKGROUND: Wound management is internationally recognised as part of hand therapy practice. However, the role of occupational therapists in this area of upper limb rehabilitation in South Africa is unclear AIM: To develop and validate a survey to examine occupational therapists' wound management practices in hand therapy within the South African context METHODS: A sequential exploratory mixed methods study design was utilised to develop a survey. Thereafter, a panel of 11 occupational therapists with relevant experience in the field rated the relevance of survey items to produce item-content validity indices (I-CVIs RESULTS: An initial survey containing 27 questions containing 214 items was presented for review. Experts rated 171 items (69%) relevant with an I-CVI of 0.90-1.00. A further 32 items (13%) were rated relevant with an ICVI of >0.80 <0.90. A total of 45 items (18%) were irrelevant with I-CVIs <0.80. The final survey consisted of 19 questions containing 139 items, excluding those that obtained relevant demographic data CONCLUSIONS: The survey demonstrated good content and face validity but is limited to use with occupational therapists in South Africa. Validation for use with different populations in different settings is recommended Implications for practice This article offers researchers within the field of occupational therapy methodology for the development and validation of a survey. Suggestions for improving the overall validity of the survey are given. The survey may be used in future studies with occupational therapists providing hand injury care in South Africa. Use of the survey with different populations requires validation using the intended target population.

围填海历史遗留区域海洋生态服务价值损失评估研究

围填海历史遗留区域海洋生态服务价值损失评估研究

The influence of land cover variation on soil erosion vulnerability around coal mining concession areas in South Borneo

The availability of information about soil erosion vulnerability is necessary as a primary consideration to determine the effort of soil conservation, particularly in the coal mining area. This study aimed to estimate the potential risk of soil erosion from land cover variation in a coal mining concession site in South Borneo. Data were taken from 18 stations of soil erosion monitoring which were evenly distributed in each land cover. Soil erosion vulnerability was quantified using the Universal Soil Loss Equation (USLE) method. The comparison mean of soil erosion among land cover types was evaluated using the Kruskal-Wallis test and followed by the Nemenyi test with a significant level of 5%. Results found that the potential risk of soil erosion was significantly different among land covers (p<0.05). The highest soil erosion vulnerability was noted in the reclamation area of 1,012.3 t ha<sup>-1</sup> year<sup>-1,</sup> while the lowest risk of soil erosion was observed in plantation forests of 47.9 t ha<sup>-1</sup> year<sup>-1</sup>. Surprisingly, the potential risk of soil erosion in natural forests was four times higher than in oil palm plantations. Besides being located in hilly areas with high slope levels, the vegetation density in natural forests was relatively low. However, our study recorded there were two critical factors that highly correlated to soil erosion vulnerability, i.e., soil erodibility (R = 0.89; p<0.05) and slope length and steepness (R = 0.85; p<0.05).

Understanding the Spatial-Temporal Characteristics of Land Subsidence in Shenzhen under Rapid Urbanization Based on MT-InSAR

Land subsidence is a common geological hazard in urban areas. It can be caused by human activities such as land reclamation and subway construction. However, rapid urbanization can accelerate the progress of these activities. Therefore, spatial-temporal analysis of land subsidence can provide a guarantee for rapid urbanization progress. In this study, Shenzhen, one of the fastest urbanizing cities in China, is selected for continued land subsidence monitoring. We collected 153 Sentinel-1A images from December 2015 to July 2021 and utilized an interferometric point target analysis (IPTA) method to generate the land subsidence in Shenzhen. Additionally, we analyzed the relationship between land subsidence and typical urbanization progress: land reclamation, transportation network, and urban construction. The results show that land subsidence mostly occurs in the western reclamation area, with a maximum rate of -74.9 mm/a in Qianhai Bay. Areas with larger quaternary marine sediment thickness in the range of 10∼20 m are more likely to experience subsidence. Obvious subsidence (<-20 mm/a) along the subway mainly occurred on Lines 11 and Line 5, which is inversely proportional to the distance from the metro. The correlation coefficient is -0.197. Areas with low road densities have a high probability of experiencing great subsidence. A relationship between land subsidence and building construction in the Guangming district is found. Obvious subsidence (<-20 mm/a) mainly occurred in the building areas, with a percentage of 43.48%.

Morphological characteristics of top soiling in the reclamation areas of post-coal mining at Kutai Kartanegara and Kutai Timur Regencies

This study aimed to obtain information about the impact of different morphological characteristics and genesis at some reclamation sites after coal-mining activities. Two coal sites were chosen as study areas, i.e. the Separi site, which is located in Kutai Kartanegara regency and the Bengalon site, located in Kutai Timur Regency. A descriptive research method was used to identify the morphological characteristics of reclamation sites at different times (chronosequence). The results showed that in-situ weathering, indicated by soil leaching caused by rainwater infiltration, led to the formation of the Ah horizon more than two years after the reclamation activity. The process of material removal and disposal (cutting, filling, transporting and levelling) from coal mining operations tends to accelerate the decomposition of parent soil material and promote the formation of pre-cambic horizons. The soils used (horizon A, B, and C) for the topsoil of the reclamation site were initially Typic Hapludults and Typic Dystropepts, although Typic Tropaquents and sandy parent materials were also used. Due to the impermeable layers of overburdening where water channels in the soil profile and deeper layers have not yet formed as human-made soil and landscape (artificial) cause rainwater to fail to infiltrate deeper layers so that with less heavy rain, the groundwater level will rise to the surface and the land will become waterlogged/flooded.

Iterative Self-Training Based Domain Adaptation for Cross-User sEMG Gesture Recognition.

Surface electromyography (sEMG) based gesture recognition has received broad attention and application in rehabilitation areas for its direct and fine-grained sensing ability. sEMG signals exhibit strong user dependence properties among users with different physiology, causing the inapplicability of the recognition model on new users. Domain adaptation is the most representative method to reduce the user gap with feature decoupling to acquire motion-related features. However, the existing domain adaptation method shows awful decoupling results when handling complex time-series physiological signals. Therefore, this paper proposes an Iterative Self-Training based Domain Adaptation method (STDA) to supervise the feature decoupling process with the pseudo-label generated by self-training and to explore cross-user sEMG gesture recognition. STDA mainly consists of two parts, discrepancy-based domain adaptation (DDA) and pseudo-label iterative update (PIU). DDA aligns existing users' data and new users' unlabeled data with a Gaussian kernel-based distance constraint. PIU Iteratively continuously updates pseudo-labels to generate more accurate labelled data on new users with category balance. Detailed experiments are performed on publicly available benchmark datasets, including the NinaPro dataset (DB-1 and DB-5) and the CapgMyo dataset (DB-a, DB-b, and DB-c). Experimental results show that the proposed method achieves significant performance improvement compared with existing sEMG gesture recognition and domain adaption methods.

The potential of biomass and carbon storage of avicennia alba in the mangrove rehabilitation area of Kedaburapat village, Kepulauan Meranti district

This research was conducted from May – August 2023 in the rehabilitation mangrove area of Kedaburapat Village, Rangsang Pesisir Sub-District, Kepulauan Meranti Regency, Riau Province. This study aims to determine the average of tree diameter, potential biomass and carbon storage of each tree and the relationship between potential biomass and carbon storage with the diameter of the Avicennia alba rehabilitation mangrove trees in Kedaburapat Village. The method used in this study is a survey method and determination of sampling points by purposive sampling. The potential biomass and carbon storage of each tree were calculated using the allometric method. The relationship between average tree diameter and potential biomass and carbon storage was analyzed using simple linear regression. The average diameter at breast height (DBH) of A. alba per tree ranged from 2.81 – 4.03 cm, the average biomass per tree was 7.39 – 12.80 kg, the average carbon storage per tree was 3.47 – 5.00 kg C and tree carbon total per ha was 32.62 – 43.95 ton C/ha. The potential of biomass and carbon storage of each tree has a relatively strong positive relationship with the average tree diameter, with a correlation coefficient (r) of 0.9921. The quality of the waters measured in this study were temperatures ranging from 28-30°C, salinity 25-28‰, and pH 7.5-7.9. Environmental parameters indicate that the condition of the rehabilitation mangrove area in Kedaburapat Village is still good and can support the life of mangrove vegetation.

APLIKASI TEKNOLOGI PENGINDERAAN JAUH UNTUK PEMANTAUAN REVEGETASI LAHAN REKLAMASI TAMBANG

Following the regulation of the Indonesian Government, every Mining company has an obligation to do reclamation for mining areas that had been exploited. One of the reclamation stages is re-vegetation to plant the exploited mine area with cover crops. Cover crop monitoring commonly is taken by direct assessment of plants growth. However, this approach is ineffective and also expensive which is proportional to the large reclamation area. The objective of this research is to apply remote sensing methods to monitor cover crop growth at Siltstone Quarry of PT Aroma Cipta Anugrahtama, in Lhoknga subdistrict, Aceh Besar. The monitoring was conducted using Sentinel-2 satellite imagery data by computing the Normalized Difference Vegetation Index (NDVI). The analysis was done in a time series from the year 2019 to 2022 using the Google Earth Engine (GEE) cloud platform. The result shows that the NDVI value is varied from 0 to 0,8 which is classified into no vegetation to high vegetation area. Based on spatial distribution of NDVI values, can be observed that the northern area has higher uniform NDVI value compared to the southern area which is more mixed. This indicates the southern part has been exploited earlier. Overall the re-vegetation successful rate for reclamation zone before 2019, 2019, 2020, 2021 and 2022 are 96%, 99,5%, 70,6%, 36,6% and 6,2%. &#x0D;

Impacts of Vocational Training and Recreational Activities on Prison Inmates: A Case Study of Youthful Offender’s Correctional Facility, Hyderabad Pakistan

The current qualitative study was conducted at a young offender's correctional facility in Hyderabad, Sindh. In-depth interviews were conducted with a sample of 07 young, convicted convicts and 03 prison officials who were chosen using a purposeful sampling technique. Furthermore, the data were analyzed by using a thematic analytical approach. The study had two goals: one was to examine what kind of vocational training and recreational activities are available within the jail, and the other was to examine the impact of training on offenders. According to the study, offenders are provided with various vocational training and recreational activities, and as a result, they have positively impacted themselves. According to this study's findings, rehabilitative education plays an essential role in offender rehabilitation by changing behavior and attitude, boosting self-esteem and self-confidence, improving employment skills, reviving humanity, improving cognitive skills, promoting growth, increasing literacy levels, and transforming offenders into law-abiding citizens. The following study recommended that every prison in Sindh should provide educational, psychological, recreational, and motivational programs based on reformation and rehabilitation. The government and prison administration should employ full-time criminologist specialists who specialize in specific areas of prisoner rehabilitation to ensure the proper rehabilitation of offenders.

Cognitive and emotional impairments associated with COVID-19 (literature review)

Background. Currently, there are two main areas of study of the impact of a new coronavirus infection on mental processes: the first is in connection with the regime of self-isolation and restrictions in a pandemic; the second – with the impact of the pathological process itself and the post-covid syndrome on the central nervous system. The results of the studies indicate the relationship of this infection with local lesions of the brain and the corresponding disturbances in the functioning of mental processes.The aim of the research. To systematize and analyze the results of studies on the main routes of penetration of the SARS-CoV-2 virus into the central nervous system, cognitive and emotional disorders in people who have recovered from COVID-19, and to discuss the areas of psychological rehabilitation for this group of patients.Materials and methods. Information search was carried out using Internet resources (PubMed, Web of Science, Scopus, bmj.com, eLibrary.ru, frontiersin.org, sciencedirect. com, ncbi.nlm.nih.gov), literature sources were analyzed for the period from May of 2020 to November of 2021 for the following keywords: COVID-19, SARS-CoV-2, cognitive functions, cognitions, cognitive impairments, emotional dysfunction, affective dysfunction.Results. According to the analysis of the literature, most researchers identify the neurogenic pathway of SARS-CoV-2 penetration into the CNS, as well as penetration through the bloodstream or through cerebral lymphatic drainage, which are a possible cause of mental disorders of a neurological nature. Correction of these violations involves the creation of a comprehensive system of rehabilitation with the inclusion of psychotherapeutic methods.Conclusions. Despite the lack of a single picture describing the specifics of cognitive and affective symptoms in COVID-19, in the most general terms, there is a certain consensus. So, quite often, post-COVID cognitive symptoms are characterized by impaired memory and attention, and post-COVID affective symptoms are characterized by increased levels of anxiety, depression, and fatigue. The issues of diagnosis and correction of disorders in post-COVID syndrome and the admissibility of the existence of this diagnosis are still relevant.

Lubelska szkoła pedagogiki specjalnej - tradycja i wyzwania współczesności (Jubileusz 50-lecia)

The Lublin school of special education, celebrating its 50th anniversary, was established by Professor Zofia Sękowska, a distinguished employee of the Maria Curie-Skłodowska University in Lublin. The distinctive features of this modern and creative concept of special psychopedagogy are interdisciplinarity, deep humanism and anthropocentrism. These features are reflected both in the methodology of scientific research, solving complex research and diagnostic problems, developing concepts, and methods of influencing special education in the area of education, therapy, rehabilitation, and social rehabilitation. Scientific research carried out at the Department of Special Psychopedagogy and Special Sociopedagogy of UMCS is a continuation and creative development of the living and current traditions of the Lublin school of special education, emphasizing the inextricable relationship and the key importance of psychological, pedagogical, and sociological problems in the theory and practice of special education.

Land Subsidence Characteristics and Numerical Analysis of the Impact on Major Infrastructure in Ningbo, China

For the construction and safe operation of major infrastructure in coastal cities, the impact of regional land subsidence that has occurred or is slowly proceeding deserves attention. Previous studies have mainly focused on the surrounding land subsidence caused during construction or operation, as well as the superposition effect of land subsidence caused by groundwater extraction. However, research on the different impacts of damage due to land subsidence in the construction and operation of urban infrastructure needs to be carried out according to the actual geological environmental conditions, reflected in parameters such as the soil properties and common loads. Numerical simulation cannot fully reflect the details of reality; however, it can avoid the influence of other conditions to focus on different factors influencing land subsidence and thus highlight the contribution of a single factor influencing land subsidence. Therefore, in this paper, we adopt field measurement data and carry out a numerical simulation analysis of different influencing factors. First, taking the Ningbo Jiangdong subsidence center (now located in Yinzhou District) as an example, area growth, cumulative subsidence and the occurrence and development of the subsidence rate of a typical urban subsidence funnel area are analyzed. Then, taking the Ningbo Chunxiao–Meishan area as an example, based on the physical and mechanical characteristics of the main soil layers in the coastal reclamation area, a numerical analysis of the self-weight/backfill and surcharge consolidation settlement of the soil layer (considering the water permeability/impermeability of the bottom surface) and a numerical analysis of the nonuniform settlement caused by pile foundation engineering are carried out. Finally, the Ximenkou–Gulou area is taken as the analysis object. Numerical simulation of metro tunnel pipeline deformation is carried out considering uniform/nonuniform settlement. The results show that the comprehensive prohibition of groundwater exploitation is beneficial to slow the land subsidence rate, while the sedimentation of silty clay in Layer 4 (muddy clay) is the largest among all the soil layers. Compared with uniform settlement, nonuniform settlement is more likely to cause connection failure between tunnel segments. The above research results can provide references for the prevention and control of land subsidence and thus the safe operation of major infrastructure.

Bacterial Communities Structure and Diversity of Soil Rhizosphere of &lt;i&gt;Brassica oleracea var.italica&lt;/i&gt; with Different Reclamation Duration in Coastal Reclamation Areas of Taizhou Estuary

Bacterial Communities Structure and Diversity of Soil Rhizosphere of &lt;i&gt;Brassica oleracea var.italica&lt;/i&gt; with Different Reclamation Duration in Coastal Reclamation Areas of Taizhou Estuary