HW #2 ESM 321 Please complete the following problems (engineering paper is recom
ID: 701693 • Letter: H
Question
HW #2 ESM 321 Please complete the following problems (engineering paper is recommended, although not properly annotated required) Yow may swbmit a prit-out from Excel theat clearly shows all the work and is with comments describing your process. IfI can't easily trace your steps, I won' be able to assign partial credit Date due: Tues, Feb 27, 2018 in class. No submissions by email. (60 pts available) Concepts to consider: .Residence time standing saock / has Use metric units Molar masses of P vs. PO Mass-concentration x volume are different into or out of pool Net ux -inputs-outputs . Wet vs dry deposition . Average nux (Total inputs Total New growth- flux into pool of live biomass Calculate volume of rain given rainfalloutputs)/2 depth and area of walershed Mg-10 & Questions 1-3 rclate to one ecosystem, and questions 4-5 rclate to another model thet shows inputs, outputs, and storage in cach sysicm, to help you conceptualize cach sysicm I. (10 points) Below you are given the average monbly streamflow from the Salzmann Creek watershed in Forest Park. I osc. You may find it helpful to start out by dawing a box o avenge o.165 mp/l. throughout the year, estimate (a) the total volume of water phosphate was found t PO (in L.) and (b) the total mass of PO (in kg of POd) leaving the watershed in an average ycar Oct Nov Dec Jan Feb Mar 0.493 1.669 2.348 2.486 please 0.500 0.333 0.199 0.191 Jul 2.349 2. (10 points) Suppose that precipitation for an average year in the Saltzmann Creck average Pconcentration in minfall was 6.2x10 mg P/L. Further, 1.64x10 kg Phat hr. Suppose that in an average is 2.60x10 ha What is the total mass of atmosphenic P input to the watershed in a year? watershed in Forest Park was 42 inches and that suppose that an average of dryfall P deposition rate was found to be year it rains for a total of 1060 hours. Assume the drainage arca of the watershed (10points) (a) lf rock weathenngrepe ents8%of Pinputs and atmosphere P represents 15% of total inputs, how much p crners 3. the watershed annually from rock weathering? (b) Based on your computations in problems I and 2, compute the net flux of P to/from the watershed on an annual basis. (c) State what percentage of total P inputs are retained (you can assume that PO is the dominan form of P being exported in stream water) in the watershed 4. (15 points) The values in the table were found in a mature forest in central Oregon (Sollins et al. 1980.Ecol. Monog. 50:261-285) Assume these values are representative of conditions at the Saltzmann Creek watershed. What is the total mass of P in (a) the top meter of soil, (b) live biomass, (c) dead biomass, and (d) the entire watershed? Mass (Meha) P Foliage Aboveground live wood Roots Conifer leaf litter 1.39 x 10 7.05 x 1 1.53 x 10 1.86 0,20 0,008 0.01 0.16Explanation / Answer
260 ha= 2600000 m2
1 inch = 0.0254 m
Total rain in year= 2600000 (m2 )*42*0.0254 (m)= 2.77*109 litre water
total water contain P= 2.77*109 (litre water)* P concentration per litre
=2.77*109 * 6.2*10-2 mg= 171.74 kg
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.