Sea Water Intrusion in Estuaries Article Example | Topics and Well Written Essays - 750 words

Sea Water Intrusion in Estuaries - Article Example The results obtained using the model includes the measure of water level, discharge and salinity level. These have shown good agreement with the observed results. Also, a direct relationship between longitudinal salt dispersion with flood-ebb loop length and tidal efficiency is also confirmed in this study (Nguyen et al, 2008b). The prediction of the salinity distribution in the complex situations like multi-channel estuaries like Mekong delta have also been reported in the literature (Nguyen and Savenije, 2006). Mekong delta is unique in its character. It has large number of branches and transports huge quantity of water (2000 cu.m per second) even during summer. The prediction model is framed on the principle that the multi-channel estuarine system would function as single entity and the paired branches could be appropriately combined to one. The results obtained from the analysis show that steady state models could predict the salinity levels very well. They could also explain the equilibrium conditions established in the estuaries during variable flow period especially during the dry seasons. Also, authors have computed the system response time for Mekong also. The data used in the paper was collected during the period 1991 to 1998. As Mekong delta is a very active morphologically, it's topography too is undergoing continuous change due to the transport of sediments through the river. Hence, the model would require continuous improvement by incorporating the recent topographical details. Further, the model also has parameters like mean estuary depth and river discharge that have high degree of uncertainty (Nguyen and Savenije, 2006). Determination of fresh water discharge is essential for quantification of salinity distribution. In the case of very low flows the salinity distribution is observed to be maximum. But the low fresh water flows coupled with high tidal flows make the accurate estimate of fresh water discharges very difficult. And in the case of Mekong delta, the multi channel characteristics make the accurate direct determination of discharge computation very cumbersome. A reliable model has been proposed to estimate the river discharge under the above situations (Nguyen et al, 2008a). The principle applied in this process is the reverse calculation, from the known values of salinity distribution the authors have developed equations to determine the river discharge. In this connection, two separate approaches have been attempted for different clusters of rivers in this basin. In the first approach, based on the information on the salinity distribution and estuarine shape of each branch the discharge i n the individual branches is computed. And in the other approach, from the combined shape of estuarine branches and the salinity distribution, the combined discharge is estimated. These analytical models could be used to compute the river discharges in multi channel estuarine regions by collecting the salinity distributions (Nguyen et al, 2008a). References Nguyen, A.D. and Savenije, H.H.G Salt intrusion in multi channel estuaries : a case study in Mekong delta, Vietnam, Hydrology and Earth System Sciences, 10, 2006, 743 -754. Nguyen, A.D., Savenije, H.H.G, Pham, D N and Tang, D T, Using salt intrusion measurements to determine the freshwater discharge distribution over

Are humans sinful Research Paper Example | Topics and Well Written Essays - 1250 words

Are humans sinful - Research Paper Example Temptations have existed from the ancient times when the serpent had mischievously tricked Adam and Eve into disobeying God’s command that presented they refrain from the forbidden fruit. Humanity has since been plagued with faults and negligence to present their evil nature towards the society. Murders, robberies and fraud cases have been evident in various cases including the parables presented by Jesus Christ like in the good Samaritan. This has been the argument presented to deduce the true nature of humanity the motive to participate in committing evil that break the supreme law. The slow change from the pure soul is witnessed within the development stages of humanity. Although human beings appear pure when they are born, the seed of sin has been buried inside their mind for generations. Evil has been developed within the society to take effect within the activities performed by humanity and these are found within the law of the land. Jesus himself was crucified for the sins of man upon the rules that had been created by the sinful society. This was the example given in the presence of the ancient evil political regime that incriminated innocent people out of the interest to be gained to deliver selfish ambitions. John the Baptist had been murdered out of a corrupt political regime that was against Christianity. Without Christianity, humanity has been tempted into sin to break the law presented in the land. Humanity had been cursed after the events in the Garden of Eden when the seeds had been cast within the soul. Those who had gone against God’s commandments had been punished, like the Israelites on their pathway to the Promised Land. The prosperous have boasted of finding means to enrich their desires after applying the means to excel in harsh presentation s among the less fortunate. However, the Bible has been extended to explain that those without the